When someone is acting stupid or says something very retarded; Dumbass
"I really dont know how to spell Orange
"Don't be such a Bum Flute!"
by Emzza October 1, 2008
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two meanings,

1.using your vagina to music with.
2.another word to describe your vagina.

"her bum flute was ripping some awesome tunes man"
by xazzyleahsarahvixcarlingford September 15, 2008
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