Top Definition
The act of penetrating ones sphincter with their own finger, in an attempt to achieve pleasure and reach climax.
'I like to sphincterbate on my couch while nobody's home.'
by JO3HO3 March 21, 2010
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×