What “Tun up” means
Tun up ("turned up") means excellent, lively or turned all the way up. It describes vibes, parties and music that are loud and perfect.
Examples
Di vibes tun up!
The vibes are turned all the way up!
How to use it
Casual slang for parties, music and good times. "Tun" is the Patois form of "turn", as in "tun lef" (turn left).