Top Definition
An open handed slap to the vagina
Joanne is kinky, she likes receiving a hard mupper before intercourse.
by Peter P. Pablo December 30, 2008
1 more definition
1.A child over 200 lbs.

2.A strange way to say maybe.
1.My handsom boy just turned 4. He is muppers.

2.Are you a virgin? Muppers.
by BandS December 27, 2006

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