What is this song??

Heard it on the radio. And all I remember is like the chorus going like. "She do it real good. Does it does it real good." I keep wanting to think it's Three 6 mafia song but I can't find it anywhere. All I get when I search is Slob on my knob by Three 6 mafia and that's not the song. Any ideas?? 2 Different guys singing at that part too.