Plural of grot; small caves or grottos, or British slang for something disgusting or unpleasant.
Short form of grotto (from Italian 'grotta,' Latin 'crypta'). In British slang, 'grot' developed as informal speech for anything unpleasant or decrepit.
British kids use 'grot' to describe anything gross—a gritty bathroom, a moldy sandwich—so a single word connects Roman caves to modern playground insults!
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