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"Rassclat" is a derivative of "Bumpaclat" and "Pussyclat", both of which are Jamaican slang for menstral sanitary towels (Tampons and Pads). "Rassclat" can sometimes be shortened to "Rass".
"Rassclat" can be used as an adjective to disparage an object, but it is most often used as a highly offensive insult against a person.
by Lee Perry August 06, 2004
an exclamation of suprise
You got asked out? Rassclat!
by rosa May 01, 2003