1 definition by UnholyCannoli69XOwinkyface

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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