Top Definition
One who donates their semen/sperm for the good of others.
Jim: Hey man, it sucks that you're sterile and shit.
Kenneth: Yo dawg, is aight, we's gonna find us a sementhropist!
by elSementhropist January 26, 2011

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.

×