to masturbate, have sex with oneself, to commit onanism
...and I caught that bitch having a onesie in the middle of the tennis court.
by BabyA December 10, 2005
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A self rolled spliff that is the size of a rollie cigarette, using one regular sized rolling paper/skin.
Dave: Is there any weed left?
John: Nah man, not even enough for a onesie.
Dave: :(
by Kempernol January 9, 2008
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When you have to pee but not poop
Hey man can I use you’re bathroom I have to do a onesie I’ll be quick.
by Moist eyecrust November 12, 2017
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A trademark registered to Gerber Childrenswear LLC, often used in connection with a one-piece garment for an infant or small child, generally worn over a diaper.
The child wore a Gerber Onesies garment.
by Onesies March 26, 2009
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a term originated from Ireland used to define a coffin
"me mum's prettier than you and she's sleepin in a bleedin wooden onesie"
by BOOPER-FUCKIN-DOOPER May 5, 2018
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“You fucked my sister?! I’ll put you in a god damn Wooden onesie you foreskin chomping thundercunt!!”
by Cloddyboi March 22, 2020
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The act of someone in the military taking a piss. In the Military they tend to add the word combat in front of everything.
Man, I just had three sodas. Now I really have to take a combat onesie
by RoyVA6 January 30, 2009
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