It happens every May. You come back from school only to find your female friends from high school getting fatter and fatter. The term blueberry muffin describes a girl who, despite meeting that description, continues to wear the same clothes she did in high school. If you haven't made the connection between the girl and the muffin, take a look at the part of the muffin which flops over the wrapper.
-From Collegehumor.com
Jamie has turned into a blueberry muffin, but I would still cover her in my frosting.
by Akbar42 August 6, 2004
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i had sex last week and now im pretty sick - that girl must've had a blueberry muffin.
by sexytime27 May 26, 2008
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Part of the BRO CODE

When a bro is intoxicated and chatting-up a girl (one of exceptionally bad quality), it is ANOTHER bros responsibility to warn his bro of the bad decision he is about to make.

In this situation the term "blueberry muffins" is subtly used as code for "Get the fuck out of there! ABORT ABORT!".
Bro sees his bro in trouble and subtly codes to him: "DUDE!! Lets go get some BLUEBERRY MUFFINS!"
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A girl who gained 10-15 lbs in college but still wears the same clothes she did in high school. For an explanation, look at the part of the muffin that flops over the wrapper.
Joe: Did you see Jen in that half-shirt halter top?

Dan: Yea...She's leaking all over

Joe: Like Blueberry muffin...

Dan: hahahaha!
by Joe October 8, 2004
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When real niggas become fake niggas and niggas won't stop being niggas ya know nigga
Yo, you a straight yellow blueberry muffin.
by Danger Dolan January 4, 2017
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Very delecious cake made with muffin batter and made without blueberries. After the cake is cooked it is dipped in syrup.
that blueberry muffin cake is delecious!!!
by daniel and madison January 19, 2009
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A girl who displays whorish behavior.
Did you hear that she had sex with 3 guys last night what a blueberry slut muffin!
by Guns aka gunslinger April 30, 2010
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