noun - a female that is not just extreamly slutty but extreamly ugly also. Not to be confussed with the general slut, the Dirt McGurt is an ugly and quite possibly fat slut, whore and or skank.
also know as "Drit Dirt" , "Dirty McGurty" and the ultimate "Dirtus McGurtus"
"dude thats the biggest Dirt McGurt i've ever see"
"DID U SEE THAT DIRT MCGURT!!!"... "oh em gee that was a dirt"
(while passing by a Dirt McGurt)"DIRT DIRT!!"
December 15, 2004