wooden board used to make a coffin, or the coffin itself

他正忙着给老人家打几块棺材板。

noun · a Taiwanese snack consisting of fried hollowed-out thick bread filled with stew and covered with a lid of toast

去台南旅游一定要尝尝当地著名的棺材板。

referring to a facial expression that is stiff, unsmiling, or somber

他整天板着一张棺材板脸，让人不敢接近。