Meaning
Besides the literal sense, in dancehall 'kill' means to defeat and dominate — 'kill di sound' is to destroy a rival in a clash, and 'kill it' / 'kill di stage' is to give a stunning performance. 'Kill mi wid laugh' means something is hilarious. A word of hyperbolic triumph, not violence, in these senses.
Examples
-
Di selecta kill di sound bwoy inna di clash.
The selector destroyed the rival sound in the clash.
-
She kill di stage last night!
She killed it on stage last night!
-
Di joke kill mi, mi cyaa stop laugh.
The joke slayed me, I can't stop laughing.
Origin
From 'kill', extended in dancehall to 'defeat/dominate/excel' (hyperbole), as in 'kill di sound', 'kill it'.
How it’s used
In dancehall = defeat/excel/slay (hyperbole), not violence. Compare 'murda', 'shella', 'mash it up'.