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An oath taken between two or more guys to never share the dirty details of the night's events.

It's done over a series of drinks; after each condition of the broath is stated each member takes a sip/shot.
"Dude, Erik is going to tell Sheila what happened as soon as he gets back to the dorm,"

"He can't, we took a broath."

"Thank god for Jager Bombs."
by Captain Doofus Brain February 03, 2010
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2
1. Past tense for breath{ing}
2.Past bro/bra , or x-bro/bra
3. the equivalent of breathed

broathed

broathing
1. he broathed last. /
i was broathing /

2. he is my broath.
by jill jackson June 09, 2009
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