"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.
A word used in an informal language in the carribean, usually called rasta man or dread talk. The word itself does not have a definite meaning although it is used as a curse word or when excited. It is used interchangeably wit other words such as rass, bomboclaat, bloodclaat etc.