1. (US Und.) a diamond.
|Vocab. Criminal Sl.|
2. (US milit./prison) in pl., tapioca (pudding).
|N.Y. Herald Trib. 27 Apr. 20/2: Here is a list of navy ‘slanguage’: [...] Fish eyes—Tapioca pudding.|
|Charleston (WV) Daily Mail 2 Sept. 6/4: Psychologist James Hargan of Sing Sing prison has collected slang phrases from prisoners [...] ‘Fish eyes and mud’ – chocolate tapioca.|
|Man with the Golden Arm 208: ‘Rubber heels and fisheyes again’ was the word on the meatloaf and tapioca.|