When two fat people have sex with(or make love to) each other.
When Jeff(a little scrawny sexually frustrated guy who likes to peek into other peoples' dorm rooms to look for and watch certain people having sex) snuck his eyes into one dorm room with the sounds of intense sexual activity emanating from it, he was all of a sudden scarred for life and lost his lunch when he saw two broke down Tri Delt bitches engaging in the act of horizontal sumo wrestling and giving each other Hot Karl.





Mark H. Urban Dictionary afficionado since February 2004.
by Mark H December 14, 2004
Get the horizontal sumo wrestling mug.