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1.
when pronounced "know what im talking about" is what is sounds like.. NUMTUMBOUT!
Man, this urbandictionary is thowed.. numtumbout?
door bushi 9 september 2003
 
2.
"know what im talking about". "numtumbout" said outloud resembles "know what im talking about"
Man, school is gay as hell, numtumbout!
door Bushi 8 september 2003