Top Definition
When a close male friend of a male acts in an unfavorable non bro-like manor typically raising speculation that he may not indeed be a bro.
Dustin, "Hey bro where have you been? I've been waiting outside your house in my car idle for an hour now..lucky for you my 6-CD changer is loaded with jack johnson, john mayor and dane cook"

Talan, "Chillax bro I was ironing Polo# 3's collar bro"

Dustin, "You only wear 3 polos at once bro? I wear at least 7. You're unbrolievable".
by ontoptheworld May 27, 2009
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