1 definition by n u t t
A celebration of when you and your bro first met. Like an average anniversary, but instead of a romantic relationship, it's a celebration for bros, though it should be held in the same regard as a regular anniversary. Such a celebration includes things like making jokes, watching shitty movies, and doing something that both you and your bro like.
Yo, yesterday was Kenny and Corvi's bronniversary! I heard that they watched shitty bootlegged musicals on shady websites until three am.
by n u t t June 13, 2017