棺材板

guān cai bǎn

1. wooden board used to make a coffin (also refers to the coffin itself); (fig.) (of a facial expression) grim; unsmiling
2. coffin bread, a Taiwanese snack consisting of a thick slab of bread, fried or toasted, then hollowed out, filled with a thick stew, and capped with a "coffin lid" (slice of fried bread)