Definition of rass in English:

rass

noun

West Indian
informal
  • 1A person's buttocks.

    buttocks, behind, backside, rear, rear end, seat, haunches, cheeks
    View synonyms
    1. 1.1 A contemptible person.

Origin

Late 18th century: alteration of arse, perhaps partly from your arse.

Pronunciation:

rass

/rɑːs/