Three-Fifths Compromise 

Penatraiting a man or a woman with three-fifths of your penis is not considered cheating.

I told her I was married, and she would have to settle for the three-fifths compromise.

Three-Fifths Compromise by Creamy white center June 28, 2017

Three Fifths Compromise 

The optimal female to orgy ratio. An orgy containing three females and two males. This creates an orgy that is not only completely heterosexual, but also keeps the number of females and males close enough so everybody enjoys it.

Craig: Yo are you settin' up an orgy soon?

Nick: Yeah you know it.

Craig: How many girls you bringin'?

Nick: I'm settling for the three fifths compromise. Enough to keep it straight, but close enough to keep it fun.

Craig: Fuck yeah!

Three Fifths Compromise by Muammad October 17, 2013

Three Fifths compromise 

When you want to fist him/her but settle for three fingers

dude1: I heard that ho is gigantic.
dude2: yeah but i had to settle for the three fifths compromise

Three Fifths compromise by anon182 August 27, 2012