A bro hater is commonly known as someone who is the opposite of FTB (For The Boys). Simply put, they are 'Against The Boys', or ATB. They consistently ditch their guys to further their own agenda, especially one involving pursuing (but never attaining) female genitilia.
Bro 1: "Hey, where's Tanner"
Bro 2: "Oh he's a bro hater, don't even bother dude"

or

Bro 1: "Yo, can you imagine being a bro hater like that Tanner kid?"
Bro 2: "No"
Bro 1: "Imagine though.."
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A person that hates on bros. A bro hater can be female or male. Bro haters hate on bros for no apparent reason other than being fucking sluts or jealous.

A bro hater is usually a female that your bro is dating. They bitch and complain about everything and interrupt with bro sessions.

Male bro haters simply hate on bros for their good looks, impressive drinking abilities, and skill of fucking multiple girls in the same night. They can be seen at local Star wars conventions or playing video games on a Saturday night.
Female Bro Hater:
David: "Yeah man, Garrett isn't coming out because he is being a pussy."

Sean: "Why not man?" "There is a party tonight."

David: "Because his girlfriend is being a bitch and told him not to." "She's a slutty whore."

Sean: "Bro, she is such a fucking BRO HATER."

Male Bro Hater:

David: "Dude, he's such a bro hater."

Sean: "I know man. I can't believe Luis blew up about me fucking his 14 year old sister."

David: "Whatever man. High-five. Very nice!"
by Fratting Hard February 10, 2010
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Also known as Dabulus tothehaterus cerberial disfunction. Originating from Loganese Paulithus The Cancurus IV it has spread to the rural population of Bangladesh and the whole world. Considered as a serious brain disfunction. Any person saying this phrase is subject to Dabulus tothehaterus cerebrial disfunction.
Mark : I don't like you, why do you always act so dumb.
Victim : Dab to the haters brooo.
Mark : *dies*
by Lt_StarKabab March 14, 2018
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