The often plastic recepticle in which men masturbate into for either dontation or insemination of their sperm.
by Marvelous 4 Eva July 05, 2003

its one of dem cups dat u fuck in.. they come in industrial and revelutionary sizes... better known as female condoms..
by the parsh January 31, 2003

In beer pong or similar drinking games, the fuck-up cup is one cup which has substantially more beer than all the others. This often causes the partner of the pourer to argue that they don't have to drink it when that cup is taken during the game.
by Brian F- September 20, 2006

by Truman b January 18, 2022

When someone does not have enough money to buy a sex toy. Instead they make one from objects you can find at home.
I walked in on him cup-fucking a glove.
by laborra November 23, 2013

the act of calling someone a stupid fucking Styrofoam cup, which means that they take up space and do nothing
person 1: hey man i think wall-e was a terrible movie
person 2: go fuck yourself you stupid fucking Styrofoam cup
person 2: go fuck yourself you stupid fucking Styrofoam cup
by moth211 June 22, 2022

by the cup fucker October 17, 2020
