A divvy is someone being daft, clumsy, or a bit thick, like their brain’s buffering. It’s a proper mild insult, more eye-roll than aggro, and you’ll hear it loads round Merseyside and the North West. Half the time it’s basically affectionate, like calling your mate a muppet when they’ve done something spectacularly pointless.
"Our Kev tried tapping his Walrus on the Merseyrail gate, kept beeping red, and goes, is it broke, la? Told him he’s a divvy."