Green’s Dictionary of Slang

a moustache.

1843		‘Madison Tensas’ Louisiana ‘Swamp Doctor’ (1850) 192: His face was hideous: a pair of tushes projected from either side of a double hair-lip.
1914		Sport (Adelaide) 3 Apr. 4/2: They Say [...] That a kiss without a tash / Is like an egg without the salt.
1938		D. Runyon ‘Cemetery Bait’ in Runyon on Broadway (1954) 517: Behind the specs and the tash is a stern-looking character.
1943		M. Harrison Reported Safe Arrival 71: See that bloke there, with the big ’tache?
1958		C. Lee diary 13 Jan. in Eight Bells & Top Masts (2001) 17: Make sure you got your name on it, the one with the thin tash and wavy hair said.
1960		A. Burgess Doctor Is Sick (1972) 85: The frame showed a generic tashed and sideboarded gangster.
1963		A. Burgess Inside Mr Enderby in Complete Enderby (2002) 69: There were criminal-looking coppers there, with wide-boy tashes.
1973		B.S. Johnson All Bull 118: Who’s that horrible man with a ’tache.
1985		A. Payne ‘Minder on the Orient Express’ Minder [TV script] 37: The Orient Express is a train, you berk. Don’t you remember Albert Finney with the tasche?
1987		‘Barbara Vine’ A Fatal Inversion 228: Fierce-looking with a big black tache.
1997		N. Barlay Curvy Lovebox 36: Smoothin’ down his zapata tache.
1999		Guardian Travel 31 July 10: A man with a tash.
2000		Indep. Rev. 4 Jan. 8: The little chaps with taches who always seemed a decade older than anybody else.
2002		J. Cameron Hell on Hoe Street 134: He sucked his tea under his tash.
2013		Eve. Standard (London) 29 Nov. 47/1: The dash for the best tache.
2019		Jme ‘Iss Mad’ 🎵 Smiling with my tash in my DP.
2023		R. Milward Man-Eating Typewriter 6: [F]ingering his own jumbo Wilhelm II tache.