This term is often used when people are drunk and watching porn, mainly used to describe a 'throbbing vein' also when people (not necessary drunk) wish to make reference to their hard penise.
Man you should see my thorbain right now
by ColinJL June 15, 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.

×