Top Definition
To spray semen upon someone, thus avoiding insemination
Dude 1: How will you defeat the bear?
Dude 2: I will onseminate him, and he shall be ashamed.
#inseminate #semen #jizz #cum #insemination #birth control
by kelliq January 12, 2010
6 Words related to onseminate
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.

×