kas-kas

fra·cas ( P ) Pronunciation Key (frks, frks) n.
A noisy, disorderly fight or quarrel; a brawl. See Synonyms at brawl

we drop off the 'fra' and double di out and bad. ;) yuzimi!
and thats how we get kas-kas to mean brawl, quarrel or as trinis would say 'bacchanal'.