Definition: Okay, here are two sentences defining "unhelm": 1. βUnhelmβ is a rare and archaic term referring to a state of complete or utter absence of a helmet, often used in historical contexts like medieval warfare. It signifies a lack of protection or defense. 2. In modern usage, itβs primarily used as a humorous slang word for being incredibly bored or uninterested, implying a lack of excitement or engagement.