Usually a horndog man who has hots for lots of lady friends. Cupcake munchers perform lots of oral sex on many wanting women. Usually the end result is horrifying. Also, cupcake munchers have a tendancy to have loud pitched voices from numerous oral sex partners.
"That Matt dude is such a cupcake muncher, I heard he ate out multiple women last night!"

"Would you stop being a Cupcake muncher?!" "Its really freaking me out."
by K&Eparty June 5, 2011
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