A pearl muslim is when a man repeatedly ejaculates on a woman so many times that the only part of her body not covered with semen is her face (the jiz acts like a hijab, the typical wear for Muslim women where only her face is viewable). "Hijab" translates to "curtain" so this may also be referred to as Pearl Curtain.
Sean: Wow, I came so much last night I gave that girl a Pearl Muslim.
Gracie: That's gross!
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