Marathon sex between two sexually athletic people. More than 12 hrs of sex-n-rest. A couple who tries to see how many postions and places they can climax in a given day, weekend, or timeframe.
Every time we've ever had sex it's always led to a fuck-a-thon. It takes me a week to recover. His rebound time is less than 10 minutes.
a long session of sex.
Chick 1: Girl, where you been all weekend? We was supposed to go to the movies.
Chick 2: My bad girl, me and my man was having a fuck-a-thon.