3 more definitions
To fart or flatulate on a person's leg.
My boyfriend flap jacked me, and it smelled terrible.
by A. Hermann February 07, 2007
The act of putting ones pussy lips on anothers forehead
Man she got so loose that she flapjacked me.
by DamioNIN October 21, 2013
A variation on a pwn created at tl/fwi forum which constitutes the ownage or pwn of a poster who has been gotten to
That wasnt just pwnage, he's been flapjacked!
by =ID= July 08, 2009