1 definition by Alex SuperTramp

the desease of being a 'bro'. When you're such a 'bro' and think you're so rad (high fives all around) that regular people feel smothered in your ego and attitude. Most guys catch brosis around 17 and dont loose it until about 23.
Common symptoms are thinking you're rad, clowning on everyone else, refering to everyone as 'bro', and always talking smack about bitches and getting laid.
That guy had total brosis.

There's way too much brosis in that crew for me to handle.

Leave your brosis at home and come have fun with us.
by Alex SuperTramp November 7, 2007
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