As quoted from Wikipedia:
"Shirley Q. Liquor
A cariacature of a black southern woman, Knipp performs the character Shirley Q. Liquor -- an Ebonics speaking, welfare-collecting mother of 19 children -- in blackface. Knipp speaks in a dialect when he is performing as Shirley. Her conversations are often riddled with malapropisms, as when she suggests that her cat needs to get "sprayed," or when she goes shopping at "K-Mark" or 'Wal-Mark.