when a girl or boy of any age who should go on a diet but however does not and thinks that they can fit in clothing that they wore last year and there stomachs hang out for all to see. if this is you take some advice and buy a larger shirt please.

also..not attractive to those who are subjected to observing such a sight.
WHOA! i walked past Tammy at the mall on Friday and I never realized how much of a munch muffin she is!
by ElECktRa May 18, 2007
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Performing cunnilingus i.e. placing one's mouth and tongue on, around and in the vagina and going for it!
"Hey Doris, I'm feeling rather peckish - get yer knickers off luv and let me do some muffin munching."
by silkpouch September 13, 2007
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to moisten a female's genetalia by joint actions of lips and tongue for repayment for services.
Man: I'll bet you a blow job.
Woman: I'll bet you a muffin munch!
by THE senator of THE taint March 10, 2008
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