Other forms: snowballs
A snowball is a ball of packed snow, or something growing fast by itself. Throw a snowball, snowball into a crisis, a snowball effect.
The figurative use is the more interesting, since a snowball grows by rolling and so does a rumour or a debt. A snowball's chance in hell means no chance at all.
1nounsnowballA ball of packed snow, or something growing fast by itself.
“The children threw snowballs at each other in the school playground.”
snowball is a ball.
Middle English snoweball is snow plus ball, with cognates across the Germanic languages.
Middle English
snoweball
English, today
snowball
From Middle English snoweball, snoweballe, snaweballe, snayballe, equivalent to snow + ball. Cognate with Scots snawbaw, German Schneeball, lb Schnéiball, Dutch sneeuwbal, Afrikaans sneeubal, li snieëbal, West Frisian sniebal, stq Sneebaal, Sneebal, Swedish snöboll, ovd sniųoboll, Danish snebold, Norwegian Bokmål snøball, Norwegian Nynorsk snøball and Icelandic snjóbolti.
Etymology from Wiktionary, CC BY-SA