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The act of masturbation
I'm going to go have myself a onesome
von Etan 5. September 2003
masturbation; sex with yourself
I bought a new porno and had a hell of a onesome last night!
von burntham 5. September 2003
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."
von Aubsy 17. Oktober 2010
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?
von braaphead 3. November 2006
Man, a threesome is way better than a onesome.
von chasebiaotch 30. März 2010
another name for masterbation
von thenumberonebitch 4. September 2003
I would assume this means masturbation.
Many people fantasize about a threesome but all they're gettin is a onesome
von b-town 6. September 2003