Top Definition
When two men spend lots of time toghether doing manly things in order to find their inner selves. It can also be used an insult to someone who's a very immature bro.
Joey and I were watching Jersey Shore and then talked about it after, just bro-ing up"

God Frank, it was nacho night and you already ate! Bro-up!
by SenseiBLC June 07, 2011

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