in warcraft3 when you are killing creeps and someone comes up from behind you and attacks you.
Woah shit0r, some fucking n00b creep jacked my shit. IM GONNA LOOSE TO THIS FUCKING N00b. AGHHHHHG, no townscroll!
by x-pose September 23, 2003
One who is creep, usually an old gross man with lots of overgrown facial hair. Someone who gives the creepies of glares.
As she laid on the bed, Ryan creepjacked her harder than ever before.
by Boltzz May 14, 2007