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Referring to a fat girl a guy has slept with or would sleep with but denies it venomously, especially to his friends. He may even ignore her completely unless she is naked on top of his dick. Origin: "Why’s a fat girl like a moped? They're a lot of fun to ride, but you wouldn't want your friends to see you on one."
"I think Mike has been riding a Moped."

"She has the hots for you, she might be fat and ugly but she's still a Moped"
by Julie the Queen November 12, 2007
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A moped is a person you are having fun dating, but would never want your friends or family to meet because they are ugly or a total loser.

Like a moped your date is fun to ride, but you would never want your friends or family to see you on it.
I've been seeing a girl for several months, but I can never introduce her to my friends or family because they would make fun of me because she is a total moped.
by Pooktastic August 31, 2009
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Fun to ride, but dont wanna be seen riding it
Dang that chick is a total moped!

"Dude, do u like that chick or what?" " No man, shes just a moped."
by Hoolia16 October 30, 2011
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cool, sexy, and amazing. A mo-ped says cool words like tite. chill and fly. They pimp out there myspaces and have beautiful pictures. There the love of all there friends life.
hanner-"goshhh mo-ped bang me."
mo-ped-"anyday lover."
by hanner November 27, 2006
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