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
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.