buttocks, ass, the part of anatomy one rests on a chair while sitting.
Such lousy was the seating arrangement, my chutad started aching soon.
callows, naive, also used for dismissing one's opinion or stand sarcastically, can be used even in friendly terms without intending and effecting offence
a. Burbak! don't speak if you don't know a thing about it.
b. Listen burbak. This is how you can make that girl mad for you.