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The group of musicians in any marching band that play the sousaphone. The group can often be seen not practicing, getting drunk, or hitting on the twirler line. It should be noted that all members of the Tuba Sex Orgy are denoted "Bros," even female members.
I wish I could be a member of the Tuba Sex Orgy! Those bros are awesome!
by TUBAFORDAYS April 03, 2017
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