milton, n. — Green’s Dictionary of Slang

milton n.

[? pun on Gray’s Elegy written in a Country Churchyard (1751) ‘mute inglorious Miltons’]

an oyster.

1841		Thackeray Comic Tales and Sketches II 175: Mrs. Grampus herself operated with the oyster-knife, and served the milton morsels to the customers .
1845		in Martin & Aytoun Bon Gaultier Ballads (1884) 180: These mute inglorious miltons are divine [F&H].