1- (interjection) A sound used to indicate or express a heavy blow or hit from any means, or a loud, explosive noise.
2- (noun) a heavy blow or hit of any means, or a loud, explosive noise.
3- (transitive verb) to hit someone heavily or hard.
3- (adjective) the power of exciting; being hit or recieving a heavy blow of any means.
That one entry where it says it's an onomatopoeia? PSSH.
They're t0t3z1y wrong.
Person - Totally! It was KASTANG-ingly! KASTANG!
Person - d00d. I'm totally KASTANG! right now. I could kick that girl's KASTANG!