Top Definition
the act of becoming brothers with a good friend after each friend having seen the others balls whether the friends like it or not; they do not have to see each others' testicles at the same time.
Dude, I walked in on Homer taking a piss yesterday and caught a glimpse of his balls; God i hope he never sees mine because I don't want us to become balls bros.
by Inferno05 August 29, 2009

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.

×