The Proposal - Favourite Funniest Scene

I had a hard time understanding what exactly she was chanting about but I found out that they are part of the song Get Low.

First, Sandra calls Betty "crazy" and begins with "The Window" and "The Wall" which evolves into the song "Get Low"

Lyrics of the Chant...

To the window, to the wall, (to dat wall)
To the sweat drop down my balls (MY BALLS)
To all these bitches crawl (crawl)
To all skeet skeet motherfucker (motherfucker!) all skeet skeet got dam (Got dam)
To all skeet skeet motherfucker (motherfucker!) all skeet skeet got dam (Got dam)

Let me see you get low you scared you, scared you
Drop dat ass to the floor you scared you, scared you
Let me see you get low you scared you, scared you
Drop dat ass to the floor you scared you, scared you
Drop dat ass ya shake it fast ya
Pop dat ass to the left and the right ya
Drop dat ass ya shake it fast ya
Pop dat ass to the left and the right ya
Now back,back,back it up
a back,back,back it up
a back,back,back it up
a back,back,back it up
Now stop ( O) then wiggle wit it
Now stop ( O) then wiggle wit it
Now stop ( O) then wiggle wit it
Now stop ( O) then wiggle wit it

I think she skipped a few lines here and there (the unbolded words) to make it 'appropriate' for all audiences.