Backfire
verb backfires (3rd person singular), backfired (past simple/past participle), backfiring (present participle)
Definition
1. To produce the opposite of the intended result.
2. To go wrong in a way that harms the person who planned it.
3. (of an engine) to make a loud explosive noise due to improper combustion.
4. (noun) the explosive sound itself.
2. To go wrong in a way that harms the person who planned it.
3. (of an engine) to make a loud explosive noise due to improper combustion.
4. (noun) the explosive sound itself.
Context Alive
She had it all figured out—a clever little trick to make her colleague look bad in front of the boss. But the moment she opened her mouth, everything started to backfire spectacularly, with the boss praising the colleague instead and questioning her motives in front of the entire team.
Meanings
3 meanings 1 Plan Goes Wrong and Harms the Planner (Verb) — VERY COMMON Common ▼
This is by far the most common use. When something backfires, it doesn’t just fail—it actually hurts the person who tried it. Think of it like throwing a boomerang that comes right back and hits you in the face. You tried to achieve something, but instead, you made your own situation worse. People use this word when schemes, strategies, jokes, or even well-meaning actions produce the exact opposite effect.
Vivid ExampleHis attempt to make his ex jealous by posting photos with another girl completely backfired on him, because she simply blocked him and moved on, while his new date discovered the truth and left him looking foolish.
2 Engine Makes Explosive Noise (Verb) — COMMON Common ▼
In a more literal, mechanical sense, an engine backfires when fuel ignites at the wrong time or in the wrong place, causing a loud bang. This usually happens with older cars, motorcycles, or engines that aren’t running properly. You might hear a sudden POP or BANG from under the hood or from the exhaust pipe.
Vivid ExampleThe old truck backfired loudly as it rumbled down the quiet street, startling a group of pigeons into flight and making the children on the sidewalk jump and laugh nervously.
3 Controlled Fire to Stop a Larger Fire (Noun/Verb) — SPECIALIZED Common ▼
In firefighting, a backfire is a fire deliberately set ahead of an advancing wildfire. The idea is to burn away the fuel so the main fire has nothing left to consume when it arrives. Firefighters “set a backfire” or “light a backfire” as a defensive strategy.
Vivid ExampleThe firefighters decided to set a backfire along the ridge, hoping to create a burnt barrier that would starve the approaching wildfire and protect the valley below.
Examples from the Street
“My plan to make her jealous totally backfired — now she’s dating my best friend.”
My strategy produced the exact opposite result I wanted; it made things worse for me
“Be careful with that approach — it could backfire on you.”
Warning that your plan might go wrong and hurt you instead
“Well, that backfired spectacularly!”
Said when something went completely wrong in an almost impressive way (often humorous/self-deprecating)
Common Patterns
[plan/idea/strategy] backfired → the plan produced the opposite of the intended result
backfire on [someone] → harm the person who initiated the action
could/might/may backfire → warning that something risky might go wrong
backfire spectacularly/badly/completely → emphasising how dramatically it went wrong
backfire in [someone’s] face → fail dramatically and embarrassingly for the person
when [something] backfires → describing what happens after a plan fails
the car/engine backfired → made a loud bang due to improper combustion
keep backfiring → engine repeatedly making explosive sounds
Collocations
3 collocationsplan backfired
a plan produced the opposite of what was intended
badly backfire
go wrong in a serious and unexpected way
backfire spectacularly
fail in a dramatic and visible way
Example Sentences
12 examples
1
His attempt to impress her by showing off his car backfired when he crashed into a lamp post
His effort to wow her with his vehicle produced the opposite result after he drove into a street light.
2
The company’s cost-cutting measures backfired on them — they lost their best employees
The organisation’s money-saving decisions hurt them instead; their top staff all left.
3
I tried to play it cool, but it backfired spectacularly and I looked like I didn’t care
I attempted to seem relaxed, but it went dramatically wrong and I appeared indifferent.
4
Be careful what you say to her — it could backfire and make things worse
Watch your words with her — they might produce the opposite effect and create bigger problems.
5
The politician’s smear campaign backfired in his face when voters turned against him
The official’s attack strategy blew up embarrassingly when the public rejected him instead.
6
My plan to arrive late and make a dramatic entrance completely backfired — everyone had already left
My scheme to show up late for effect totally failed — nobody was there anymore.
7
The old motorcycle backfired loudly and scared everyone on the street
The vintage bike made a sudden explosive bang that frightened all the pedestrians.
8
When strict parenting backfires, teenagers often rebel even more
If harsh rules at home produce the opposite effect, young people frequently push back harder.
9
Her revenge scheme backfired badly — she ended up looking petty and jealous
Her plan to get even went seriously wrong — she came across as small-minded and envious.
10
The surprise party backfired on us when Tom walked in through the back door first
The secret celebration went wrong for us after Tom entered from the rear entrance before we were ready.
Learner Examples
★
My plan to seem fluent by speaking quickly backfired — nobody could understand me and I had to repeat everything
My strategy to appear proficient by talking fast produced the opposite result — people couldn’t follow me and I had to say everything twice.
★
Threatening students with extra homework often backfires on teachers because then we have more marking to do
Warning learners about additional assignments frequently hurts instructors instead since we end up with more papers to grade.
Phrasal Verbs & Idioms
1 item Idioms & Expressionscome back to bite — cause problems later
Skipping those meetings will come back to bite you eventually.
Synonyms & Antonyms
7 items
Synonymsblow up in your face
informal, plan goes wrong
go wrong
not turning out as expected
boomerang
coming back to hurt you
misfire
failing to work as intended
Antonymswork out
going as planned
succeed
achieving the desired result
pay off
producing good results