Jackfire 

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.

Jackfire by Angry Dan May 14, 2004

jackfifer99 

An epic dude who makes cool projects and hates black cats with the name of petita

whoaaa is that jackfifer99?IMA FOLLOW HIM

jackfifer99 by noiceuserlololol May 6, 2021

jackfifer99 

a cool dude who makes cool stuff he makes alot of projects and plays roblox

oh look its a jackfifer99!!!!

jackfifer99 by noiceuserlololol May 7, 2021