shit-eating

The compound "shit-eating" is a modern, vulgar American English formation. Its literal sense, "consuming excrement," is used metaphorically to describe two distinct but related facial expressions and behaviors. The first meaning, a smug or malicious grin, evokes the illogical satisfaction of someone who has gotten away with something foul or deceitful. The second meaning, of contemptible servility, paints a picture of someone so obsequious they would perform a degrading act. The term leverages the strong taboo and visceral disgust associated with its first element to powerfully intensify the contempt conveyed by the adjective.

Structure: shit (excrement) + eating (consuming) - shit: A word of Germanic origin (from Old English scitte), functioning as a noun meaning feces or excrement. In this compound, it acts as a vulgar intensifier. - eating: From Old English etan, meaning to consume food. In this compound, it functions as a present participle, literally describing the act of consuming.