adjective; meaning that something is only to be spoken about between two or more dudes/bros
Bret: Brofidentially, do you think I could get with Katy at the party tonite?

Keith: Totally dude, I won't tell her ex if you won't
by El-Hombre-De-Arena January 8, 2012
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noun- a strict bond shared between two bros that talk about something that cannot be shared with chicks, babes, non-bros etc.
can also apply to brocrets that may threaten other bros or chick prospects.
This is full brofidentiality.

OK, not telling your girl about this.
by BroMan101010101 September 18, 2012
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