Meaning
Lively, hyped, and full of energy — at the very peak of excitement. It is used of a party, a tune, or a person going full-tilt: when a session is 'tun up', the crowd is wild, the music is pounding, and the vibe is at its height. Built from 'turn up' with the sense of a dial turned to maximum, the word captures the moment a dance or an event catches fire and everyone is caught up in the energy of it.
Examples
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Di dance tun up fi real tonight.
The party is really lively tonight.
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Dis tune tun up!
This song is a banger!
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Di vibes tun up from early.
The energy was high from early on.
Origin
The Patois pronunciation of 'turn up', in the sense of turning up the intensity or volume, now used as a state of high energy.
How it’s used
Overlaps with the international slang 'turnt up' but predates its mainstream spread. Describes vibe and energy.