When immediately after sex you cannot remember why it was you decided to have sex with this person in the first place. Experienced more by men, but not exclusively. This is not a medical emergency as the symptoms typically fade within 24 hours at which time you want to have sex with that person again.
Seconds after sex...
Girl to Boy: Hey, that was amazing. You're so hot!
Boy to Girl: Who are you and how did I get here?
Girl to Boy: Oh no, bad case of Sexual Amnesia. Here's my number, call me tomorrow.
Girl to Boy: Hey, that was amazing. You're so hot!
Boy to Girl: Who are you and how did I get here?
Girl to Boy: Oh no, bad case of Sexual Amnesia. Here's my number, call me tomorrow.
by Duece79 June 04, 2018

The act of sitting a fat girl's chest and jerking off, trying to get long ropes of cum to encircle the girl's face. Not to be confused with roping the rat, where the act is the same, but with a very skinny girl.
Man 1: So what ever happened with you and that fat girl from the bar? Man 2: We went back to her place, banged for a big, then I sat on her tits and started roping the pig.
by Duece79 September 19, 2018

Friend #1: Hey man, you see that girl I was with at the bar on Friday? Not bad, right? Friend #2: Dude, not hot. Friend #1: Well, she was in good shape. Friend #2: Agree, she was in good shape.
by Duece79 November 07, 2017
