when your mouth could not possibly taste or feel any worse, usually occuring the morning after a long night of partying including alcohol, excessive smoking and/or other "party favors"
I've got to head to the crib to brush my teeth man, I've got a bad case of bumtongue.
by KZi October 22, 2006
1 more definition
A large, meaty column of flesh that punches out from the sphincter of an Ostrich in order to expel fecal matter.
Holy crap! Look at that Ostriches huge bum tongue!!
by Pail Plovers April 13, 2011