You think your shit don't stank
But you are Misses Pee-Yew
He is saying that she thinks she can do no wrong but in reality she is the one who is causing their problems.
And, “pee-yew” is a noise people make when things stink, so she thinks she doesn’t stink although other people say differently.
This is also a reference to OutKast’s song “Roses”
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