The word 滚蛋 is formed by combining two simple, concrete characters to create a vivid metaphorical command. The first character, 滚 (gǔn), means "to roll" or "to boil over", imparting a sense of forceful, continuous motion. The second, 蛋 (dàn), means "egg", an object that is both commonplace and fragile. Together, they create the blunt image of "rolling an egg away", a visually immediate and dismissive metaphor telling someone to scram or get lost, leveraging the combined literal imagery to express a figurative, imperative meaning.