From Middle English tusshe, tusche, tussch, tossche, tosch, from Old English tūsc, from Proto-Germanic *tunþskaz. Doublet of tusk.
Meanings
(dialectal) A tusk.
[…] he was still a majestic-looking pig, with a wise and benevolent appearance in spite of the fact that his tushes had never been cut. 1943 November – 1944 February (date written; published 1945 August 17), George Orwell [pseudonym; Eric Arthur Blair], Animal Farm […], London: Secker & Warburg, published May 1962, →OCLC:
Perhaps one or two whose lives have patient wings, / And through whose curtains peeps no hellish nose, / No wild-boar tushes, and no mermaid's toes [...]. 1818, John Keats, To J. H. Reynolds, Esq.:
A small tusk sometimes found on the female Indian elephant.
Short for toches, from Yiddish תחת (tokhes), from Hebrew תַּחַת (taḥaṯ, “bottom”).
Meanings
(US, colloquial) The buttocks.
Are you gonna tell Glenn?...About you and that kid, and him squeezing your tush. 1998, Tim Herlihy, The Wedding Singer, spoken by Robbie Hart (Adam Sandler):
He glanced through the letter and shook his head. "Tush! tush! And the wife of the bank manager too—the bank manager of Pudlington, James! Can you conceive of anything so dreadful?" 1920, Herman Cyril McNeile, chapter 1, in Bulldog Drummond:
"Tush, Sir Minstrel," replied the archer, displeased at Bertram's interference, […] 1831 June–November (date written), Jedadiah Cleishbotham [pseudonym; Walter Scott], chapter [XIII], in Tales of My Landlord, Fourth and Last Series. […], volume IV (Castle Dangerous), Edinburgh: […] [Ballantyne and Company] for Robert Cadell; London: Whittaker and Co., published 1 December 1831 (indicated as 1832), →OCLC, page 275: