Question

Wet Blanket a person who spoils other people's fun by being depressing, dull, sour, nagging, or humorless

Accepted Answer

I hope Terry doesn't come to the amusement park with us—he's such a wet blanket. This is an early 19th-century expression. Native Americans and others often put out their campfires with blankets they had dipped in the nearest river. If fire represents enthusiasm, excitement, passion, and joy, then the wet blanket that puts out the fire stands for a pessimist or spoilsport. A person acting like that will rain on your parade.

Idiom	Wet Blanket
Example	I hope Terry doesn't come to the amusement park with us—he's such a wet blanket.
Meaning	a person who spoils other people's fun by being depressing, dull, sour, nagging, or humorless
Origin	This is an early 19th-century expression. Native Americans and others often put out their campfires with blankets they had dipped in the nearest river. If fire represents enthusiasm, excitement, passion, and joy, then the wet blanket that puts out the fire stands for a pessimist or spoilsport. A person acting like that will rain on your parade.

Wet Blanket Person Fire I Hope Terry Amusement