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1.
The act of masturbation
I'm going to go have myself a onesome
av Etan 5 september 2003
 
2.
masturbation; sex with yourself
I bought a new porno and had a hell of a onesome last night!
av burntham 5 september 2003
 
3.
An awesome and alternate name for masterbation, jacking off, or pleasuring yourself.
Riley: "What's Erik doing in the corner?"

Aubrey: "He's having a one-some with himself."
av Aubsy 17 oktober 2010
 
4.
a words that stupid people use to mean one on one sexual intercourse, but it actually means to have a wank.
downy: there's a threesome going on in that tent, and a onesome going on over there.

bretherin: what? u mean someones having a wank?
av braaphead 3 november 2006
 
5.
masturbation
Man, a threesome is way better than a onesome.
av chasebiaotch 30 mars 2010
 
6.
another name for masterbation
av thenumberonebitch 4 september 2003
 
7.
I would assume this means masturbation.
Many people fantasize about a threesome but all they're gettin is a onesome
av b-town 6 september 2003