What it means
A very British way to say someone's a bit drunk, not fully gone. If you're half-cut, you've had enough to get louder, chattier, and a touch too honest, but you're still mostly holding it together. It sits in that merry middle ground between tipsy and properly smashed, with a slightly old-school pub feel.
Usage examples
"He turned up half-cut at pre-drinks, chatting absolute nonsense, tried ordering a doner on an app, then remembered it was Tuesday and he was still in his lanyard."
"By the second round at the office party everyone was half-cut and suddenly best mates with the boss."
"I was only half-cut, just enough to volunteer for karaoke and pick the longest song on the list."
"We were only half-cut after the pub, then Sam started texting his ex like he'd cracked the code of romance."
"Dad came back from the wedding a bit half-cut, talking to the dog like they were old army mates."
Where it comes from
In British English, cut has meant drunk since at least the 1700s. Half-cut came along as the lighter version, meaning someone’s only halfway there, merry, loosened up, but not fully wrecked. It’s a proper UK pub phrase with that old boozer warmth still clinging to it.