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1.
The brown stain around the rim of a female buttwhole.
After Tommy ate the mexican prostitute's birkle, his lips resembled those of a 2 year old eating chocolate pudding.
by Kyle O. June 14, 2007
 
2.
a mixture between a bird and a turkle. they swim in circles in swimming pools.
a juemaclister birkle (common name: jue birk)
by pedro mendes October 31, 2007