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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it is the sensation a bro gets when he either has been promised chill time with a bro and then gets cancelled on or the individual has to wait for a long period of time before they chill.
Dude 1: hey bro when we gonna chill?
Dude 2: sorry bro i dont get into town for two months.
Dude 1: dude your giving me bro balls over here.

example 2

Dude 1: we still good to chill tonight?
Dude 2: sorry man i gotta cancel my moms in town
Dude 1: bro you are giving me mad bro balls
by Jmaro December 14, 2010
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The act of air humping in a male friends personal space to make him freak out. Usually done by two or more guys.
Dude, Ryan deserves a good Bro Balling.
by Yahn Upsydurhead October 31, 2015
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