I remember hearing this song before, but I don't know what it is.?

All I can remember is the chorus going ether get tha azz, get tha azz, get tha azz, or the word get was replaced with hump or the word get wasn't even there at all. Also it had this party type of inturmental in the background. I love how the song sounds, but I don't know how it sounds. Can anyone tell me the name of this song.