wooden board used to make a coffin (also refers to the coffin itself) / (fig.) (of a facial expression) grim / unsmiling / 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)
自作自受
zì zuò - zì shòu
(idiom) to reap what one has sown / to stew in one's own juice