A noun used to describe a girl who one does not know, often as a substitute for her name. One, however, would not directly address a person as broher. Usually, this person is someone who the speaker does not care for or is ambiguous about.
Broher's going through your stuff.

Whatever happened to broher?
by Keeeeeeelsey May 21, 2008
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The logical unity of two bros who will goad each others' bad ideas without hesitation
Your bro: Let's go find some ants to pee on.

You, using your broherence: OK (gulps Mountain Dew then passes said Mountain Dew to your bro)
by Fitty Fishy July 5, 2022
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