Top Definition
a person who masturbates so much each day, it has become part of their nature and will continue to do it without even thinking about it.
Dude #1: dude, i heard Jimmy jacking off in the bathroom!
Dude #2: it shouldn't be a surprise, that guy is an ejaculatron.
by awesome-o 4000 March 31, 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.

×