Top Definition
verb. When a plan backfires on you, because you're a stupid boxhead who doesn't know any better.
Origins: Like backfire, only change "back" to "Jack" because everything Jack does backfires on him.
God's plan to make a superhuman race with boxes for heads really jackfired on him.
by Angry Dan May 14, 2004

The Urban Dictionary Mug

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

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The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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Soft and offensive. Just like you.

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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