What it means
Boozer is classic British slang for a pub, usually your local spot where you slip in for a pint and a bit of chat, then somehow lose a whole evening. It also gets used for a heavy drinker, like he's a proper boozer. If someone's down the boozer, they're just at the pub.
Usage examples
"Where’s Dan? Down the boozer with his dad. Said he’d be back after one pint, but he’s three rounds deep already."
"Fancy a quick one down the boozer after work, just the one mind, I've got an early start tomorrow."
"The old boozer on the corner finally reopened, same sticky carpet, same darts board, proper lovely."
"We were only meant to pop into the boozer for one, then Kev started another round and the whole night went sideways."
"That little boozer by the station looks rough from outside, but inside it's all old lads, fruit machine jingles, and surprisingly decent chips."
Where it comes from
Boozer is built from booze, a word for alcoholic drink that's been around in English for centuries. By the 1800s, boozer was already being used for a heavy drinker. From there, British slang also stretched it to mean a pub, especially the kind of local place where the regulars plant themselves for a pint.
Other ways to say it
This expression also appears in