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1. A fellow trombone, usually male. A member of the trombone section.
2. A fellow trombone who is a true homie / with whom you may have been through some crazy band shenanigans. Only the truest of trombone bros receive this rank.
3. A member of the trombrotherhood.
I'd die without my trombros.
by TidalWhities November 14, 2016
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