Top Definition
One that perserves his sperm by jacking off.
My step father is the best at sperminology!
#sperm #jacking #off #ology #gross
by Leznerd January 13, 2012
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.

×