A Brononym is a synonym for the word bro, used when someone has been called bro and needs to respond with another bro-like word.

At the end of the 2009 film, "I Love You, Man", both Peter Klaven (Paul Rudd) and Sydney Fife (Jason Segel) engage in a Broathlon inlcuding the brononyms: Man, Bro Montana, Bud, Dude, Brosiph Goebbels etc...
Bro1: Sup bro
Bro2: Not a whole lot brodike
Bro1: Woah dude, no need to be a brodouche

Bro2: Suck it Han brolo
Bro1: You suck it broklahoma

Bro2: Whatever, brohio
Bro1: Hahaha, those were some good brononyms bro back mountain
by Milpa Bro October 18, 2011
Get the Brononym mug.
A bro that would like to stay anonymous
"Hey bro, did you like totally write that rad comment on that chicks formspring?"

"Yeah bro! but i'm totally trying to stay brononymous about it"
by Huntuh March 25, 2010
Get the brononymous mug.