Yorkshire folk don't waste words, they're too expensive. The dialect is blunt, brilliant, and proud. If a Yorkshireman says owt nice to you, frame it. It doesn't happen often.
Trying to teach the nan to floss
When you're attempting the utterly impossible with someone utterly resistant, usually an older relative faced with newfangled nonsense. It's a lost cause painted in love and frustration, the moment you realise your gran's hips aren't built for Fortnite dances.
Grim up north
A wry, self-aware nod to the grey skies and no-nonsense streets of northern England. It's the phrase you let slip when the rain's been lashing for days and a mate from London asks how things are—equal parts complaint and quiet swagger, wrapped in a knowing wink.
Berk
A berk is a fool, an idiot, the one who reverses into the only other car in an empty car park. It is a mild, almost affectionate insult in British English, far softer than it sounds, the kind you can say in front of your nan. More daft than offensive, despite some surprisingly rude roots.
Top-drawer
Top-drawer means properly first-rate, classy, the good stuff. You use it for anything that feels a cut above the rest: a player, a meal, a hotel, a performance, whatever's come out spotless and a bit posh. It's got an old-school British ring to it, like saying this didn't come from the bargain pile, it came from the drawer with the best bits in it.
Lark about
To lark about is to play and mess around in a carefree, high-spirited way, full of jokes and silly antics with no real purpose but fun. The lark here is the playful sense of a bit of mischief and adventure, not the bird. Kids lark about in the playground, mates lark about on a night out, and someone larking about is enjoying themselves and not taking anything too seriously.