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1.
Excess Bung Mung or Shit caused by a result in bad wiping practices. In laymen terms, excess shit on or around your ass.
I took a shit and couldn't get rid of the excess bung mung...

Or

She was performing a Rusty Trombone and mentioned i had some excess Bung Mung and continued..

Or

A girl I met at the bar visined my Drink and thoroughly enjoyed my Bung Mung later that night....
by Halcom m ybalzitch May 30, 2009