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

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