A word which can used as an adjective to describe anything that is good. It cannot be a negative description.
That roller coaster is such a behuniak!
Some thing or person that is whack (which means really good or really bad).
That's a whackasella of a car, yo.
other wise known as muff gone mouldy
close your legs i can smell your twat!
an utter and complete bitch.
She is such a twat; she calls everyone names.
Tell that twat to shut her trap.