Counter Sex
The act of having louder sex than the couple in the bedroom/hotel room next to you
Let's counter sex these people next door, they're going to get what they deserve
Counter Sex
When your girlfriend cheats on you and as revenge you have sex with the guy in question.
"Dude my gf cheated on me with my brother."
"Man you should totally Counter Sex her."
"Man you should totally Counter Sex her."