The culmination of all sexual desires that one feels at a given moment. May be used in either interjection or noun form. Not to be confused with "horny," as bahst describes one's visceral feeling on a specific subject rather than a general state.
In noun form, bahst may simply be used as a synonym for the physical act of sex.
Derived from the slang usage of bust
Check out that girl on the left. Mmmm. Bahst.
I'm in desperate need of some delicious bahst.