👉 "A chestnut capped" is like describing someone's head as having a particularly thick, nutty crown - think of it as the literal, literal, and utterly ridiculous "crown" on their noggin, made entirely out of roasted chestnuts. It's like saying "you're wearing a headband made of peanuts" but way more absurd.
Here's an edgy example: "After the disastrous chestnut capped wedding, I decided to start a new hobby - identifying the nutty-topped skulls in my backyard."