A term of endearment appropriate only when the person it's directed at is not wearing any pants.
*Girl has just undressed for the shower*
*Boy comes in*

Boy: Hey, butt-butt!
by Breezy Cakes October 20, 2009
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A butt butt is a nickname for a person who is a huge asshole. or a nickname for a person you adore use wisely.
girl: i hate that dress on you, you are so hideous

girl2: ok butt butt

boy: i love you baby
girl: i love you too butt butt
by clownface._ August 12, 2019
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Biting the two butt cheeks together!

When messaging your girl, or doing it doggy, you bite both her butts with your teeth at the same time.

Just the way Mr Butt does it! Hence, BUTT'S Butt Kiss.
Surprise her with Butt's Butt Kiss and watch her moan

She had a bum you wanna Butt Kiss
by Pot boys June 20, 2018
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Pretty much another name for undies (usually the brief kind)
Amy:hey jess, iiiiiii can see ur butt butt cover AGAIN. pull your damn pants up woman!
Jess:well at LEAST they are not grandma undies
by JESS et AMY May 21, 2006
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A term used when you are unable to come up with a word or phrase to explain your frustration or to be used as a way to direct any conversation to something else.
Girl: Hey I haven't had my period in 2 months and I think I'm pregnant with your child!

Guy: Oh really....butt butt wiener

Girl: Umm ok, never mind.
by Dr.Phenwall April 24, 2011
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Is what you call a butt you are very fond of.
I love my juicy little butt butt so much.

Let me touch your juicy little butt butt.
by Ilysfm1431 August 30, 2018
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