A mustache, especially a large or distinctive one worn on the upper lip.
British slang shortened from 'mustache,' which comes from French 'moustache,' ultimately from Italian 'mostaccio' and possibly Greek or Arabic roots referring to the mouth area.
The word 'tash' became especially popular in British culture during the 1970s when large, flamboyant mustaches were a fashion statement—think Freddie Mercury's iconic look that made facial hair an art form.
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