A one-pieced garment that is also known as a bodysuit or leotard; A term usually used for referring to an infant's bodysuit or leotard.
The baby wearing the grey armless legless onesie was crawling around in his playpen.
A cover for a orgy. Teens use this often as a cover to trick there parents
Hey we're having a party
What kind
A onesie party
I can let you drown but, I can't bring this ship into Tortuga all by me onesy savvy?
to be, by law, cooler than anyone who doesn’t have a onesie
“bro did you see Hans solo with that onesie on??? i thought he was so cool!!! but Luke Skywalker didn’t have one so we determined his lameness. “
Coloquial term for solo sex or masturbation
"I went to a club, met two guys and had a threesome last Saturday - how about you?" "I stayed at home, watched TV and then had a onesie..."