Onesie

Onesie comes from the word "one" and means a one-piece suit, usually in the form you use for lazy days at home. It is also used for one-piece snowsuits and one-piece motorcycle suits. The word is sometimes spelled onesy.

The name may be derived from the registered trademark Onesies®, which is a range of clothes for infant children. The word onesie (in singular) does however, in modern usage, more often mean a suit in adult size.
When I come home from work, I just like to change into my onesie and watch TV.
by EliasG June 04, 2013
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Onesie

Warm terry-cloth awesomeness shaped like different characters.
"If your onesie doesnt have a butt flap, you're gonna have a two-sie"
by ElizabethDrake May 08, 2018
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Onesie

When a girl is so tight, you can only fit one finger in her.
Emma's a Onesie!
by Lateofthepier October 20, 2009
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Onesie

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 09, 2008
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Onesie

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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onesies

Colloquial description of a one piece leather suite used for motorcycle riding. Term originally coined by highly esteemed female Australian bike rider of Melbourne location many many years ago. Since purchasing her own "onesies" it has been decreeded under Melbourne Bike Rider assesment to be the hottest arse in a set of onesies evvaaaaaaaaaaar !!!
she " Dude onesies for the track today ?"

dude "hell yeah help me pull 'em on"

she " meh, your arse aint never gunna look as good as mine does in onesies"
by sharkuss February 02, 2010
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onesier

A onesier is defined as someone who wears onesies in public.
She wears her hoodie cat onesie everywhere...that girl is a chronic onesier.
by Jo Onesier January 17, 2017
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