A person you meet at an event or bar who is cool to hang out with at the time but you never talk to or hang out with again. A throw away friend.
He was really cool at the bar last night, but he's definitely a plastic cup friend.
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A cup of hot water. or otherwise in most cases a very loose vagina...
wow that pussy was loose. id rather fuck a "hot cup of water".
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When you take a handful of frozen cum and smack yo "bitch" in the face with it
After we went to Subway, Cameron gave me a Montana Jello Cup, it was great!!
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In a game of beer pong, one team will be completely drunk while the other team will be focused on winning. For example, Benny and Noam are not paying attention while sam throws a high arc into 1 cup while burke bounces the ball at the same time into another cup
3 cups gone, and the game is half way over
"holy crap that team really knows how to pull a three Cup Slayer"
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The act of cupping your boyfriend's balls with a handful of peanut butter while going down on him.
I forgot to get Eric a Valentine's day gift so I gave him a peanut butter cup.
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When the United States will finally win a world cup and thus cause the apocalypse.
The US wins the 2010 world cup!
*10 seconds later all hell breaks lose*
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