Especially amongst teens, it's when a boy gives a girl a bunch of PDA(public displays of affection), so she feels all important in front of her friends, in the hopes that it leads to sex.
boy 1: Man, why you buyin' this bitch flowers and holdin' hands all the time?
boy 2: I'm cupcaking her. I'll be fuckin' her by the end of the week, watch!
by AnEarToOaklandSpeak July 13, 2010
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Cupcakes is a phrase used to alert another male in your group of a passing female with nice breasts when you don't want anyone else to know.

Originating from the California Gurls video clip by Katy Perry
Male 1: Dude, check out the Cupcakes she's packing!

Male 2: Oh hell I'd like to ice those babies!
by Euphoricenterprises May 1, 2011
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sitting intimately next to someone else in a flirtatious manner (like fresh cupcakes that expand on a baking pan to touch one another)
damn, look at them cupcaking like two cupcakes
by kflee April 23, 2008
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A cupcake is NOT a muffin my friend. There is a distinct difference!! A cupcake is a cake baked in a cup. However, it is not just cake in a cup; If I were to stuff a slice of cake into a coffee cup that wouldn't make it a cupcake. That would make it a slice of cake in a coffee cup.
The real question is not what is a cupcake, it is what is a muffin?! Is a muffin a fin in a muff?!?
Cherry baked cupcakes by pouring the batter into little cups and baking them in the oven.
It tasted like a cake, not a muffin, so she put frosting on it.
by Superior Simi February 18, 2010
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when a bald-headed person inserts his/her head into a vagina, and the owner of the vagina creams all over the bald head, such that the ejaculate resembles vanilla frosting on a cupcake
Natalie Portman stuck her head up my pussy and I was so turned on that I made cupcake.

Yo, I seen yo' man last night- I made cupcake like he neva fuhget.

Nothing Compares to Sinead O'Connor's creamy coochy cupcake.

"C" is for cupcake and it's good enough for me!
by MuzziMay March 1, 2010
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The act of throwing freshly baked cupcakes at someone's vehicle or property.
My ex made me mad, so after I pull the cupcakes out of the oven, we are going cupcaking.
by Mad Blonde July 28, 2010
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