To ruin one self's or another's chance to get pussy.
Guy 1: Dude I didn't end up getting laid last night
Guy 2: Shat on your cat huh?
Guy 1: George shat on a cat at his date.
Girl 1: Damn, he's had blue balls for weeks.
Guy 1: My dad busted into my room when my girlfriend was over and totally shat on my cat.
Guy 2: I feel you bro, my parents make me keep my door open.