Another way of describing something as being COMPLETELY, undeniably full to its absolute maximum limits.
You see the red bag this morning? It was totally at three quarters and Jon just left it there.
by dictionarybcel March 22, 2018
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Child of a person's father with that same person's maternal aunt or child of a person's mother with that same person's paternal uncle.
My three-quarter-sibling is a good person.
by Mr. Jacov November 23, 2019
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In Swinging, the Three Quarters Swap is sex between two couples, where one woman may only have sex with her husband or the other female, but not the other male. So a man can have sex with his wife and the other woman, the other woman and the other male, or the other woman, but his wife may not have sex with the other male.
Hey baby, we're going swinging tonight, but we're only going to do a Three Quarter Swap. I don't want you messing around with any guys besides me!
by Tony "Tone" Booyah March 31, 2011
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A party held for someone nine months to the day after there birthday because it has been three quarters of a year since there birthday.

He was born on June 12th so his three quarter birthday will be on March 12th.
by judge dredd7 October 12, 2012
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One quarter away from a full on boner
When I was dancing with that girl last night I got a three quarter chub so quick. I think she liked it dude
by Slutslut October 21, 2013
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When Juan is in the woods with three guys.
Boy, I thought Juan went camping but he's three quarters husky instead.
by Chub daddy October 24, 2013
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When a man and a woman have a baby together, then the woman realized she chose the wrong spouse when she met the man’s brother. They decide to have a baby together. These two children are known as “three-quarter siblings.”
“Dude! I heard she fucked his brother, and had ANOTHER kid! They are going to be three-quarter siblings!”
by baeify September 28, 2021
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