Green’s Dictionary of Slang

dicer n.¹

a hat.

1876		St Louis Globe-Democrat 19 Jan. n.p.: Whereupon, the party addressed takes an inventory of his friend’s clothes and [...] as to his head-covering, he thinks had better ‘shoot that tile’ and buy a new ‘dice,’ as ‘cadies’ of that style are out of fashion.
1884		Puck XV-XVI 68/1: And he girdeth up his loins and he putteth on his dicer, even his dicer of silk.
1887		Lantern (N.O.) 9 July 2: Now Lehman wears his dicer down over his eyes.
1896		Ade Artie (1963) 56: Tommy—new suit, new white necktie, new dicer, new shoes.
1903		E.W. Townsend Sure 147: Whiskers holds out his hat about five feet up. Say, she let go, and de toe of her shoe runs tru de top of de silk dicer.
1915		Van Loan ‘On Account of a Lady’ in Taking the Count 124: He tipped his mitt de minute he took off his dicer.
1921		P. & T. Casey Gay-cat 302: Dicer—a hat Synonymous with ‘lid,’ or ‘beany’.
1935		A.J. Pollock Und. Speaks 30/2: Dicer, a derby hat.
1944		C.S. Montanye ‘Shoulder Straps’ in Thrilling Detective Feb. 🌐 McClain [...] hung his dicer on the chromium hat-rack.
1949		Monteleone Criminal Sl. (rev. edn).
1956		A.J. Liebling ‘Days with the Daydaybay’ in Just Enough Liebling (2004) 187: Of course, the dicer fell to the floor, where it rolled between a woman’s feet.
1962		Ragen & Finston World’s Toughest Prison 796: dicer – A hat.