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1.
Conceptually; a hog slam is considered to be a equivalent to a slump buster. You find a girl who is lower than you on the proverbial totem pole of life and you fuck her.
Randall : Did you fuck Bipolar Betty again ?

Gene : Totally dude. You have no idea how fucking awesome it is to hog slam that fat slut.

Randall : Brick Shithouse Betty! You've really gotta watch with the hog slammin' people might think your a chubby chaser.

Gene : No worries there Randall, I fucked your anorexic sister last night.
by Darker April 22, 2010