Short for over the top, usually said as the letters. You drop it when someone’s going full extra, whether it’s a blinding outfit, a massive reaction, or planning a kid’s party like Glasto. Can be a bit judgy or just friendly ribbing, all down to your tone. Handy little put-down for when subtlety’s nowhere to be seen.
"Dave rocked up to the pub in a three-piece suit and a speaker. Everyone else was in trackies. Mate, that’s proper OTT, grab a pint."