when you have crabs, and you wake up after having sex. Your crabs are crusted to your genital region with Scrust.

This also may occur with pubic lice.
"his Scrustaceans are all up in this bitch."

"Woke up with some new scrustaceans."

"These scrustaceans are starting to smell really bad."
by peapeenyc March 4, 2014
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