The Flab Stab is the mistaken thrusting of your penis into
the folds of flesh in a larger girl's thighs or buttocks rather
her vagina. This typically only occurs at the moment of initial penetration, and hopefully
only occurs when
one is quite drunk.
"Dude, I'm embarrassed to say it but I took Brenda home last night and while I was trying to pork that
fat slut I gave her the flab stab."