Green’s Dictionary of Slang

feather-bed n.

(US) an extremely fat person; also attrib.

1877		J. Diprose London Life 45: Oh, isn’t she von for cramming herself; blessed if she ain’t a regular feather bed vot’ll always hold more.
1890–1904		Farmer & Henley Sl. and Its Analogues II 380/1: Feather-bed and Pillows, subs. phr. (venery) – A fat woman.
1933		Nicholson & Robinson Sailor Beware! I i: wop: Too skinny. mattie: You polacks all go for them feather-bed mamas.
1950		WELS [DARE].

SE in slang uses

In compounds

feather-bed jig (n.)

sexual intercourse.

[1611		J. Cook Greenes Tu Quoque Scene xiii: When thou art growne to bee An old Upholsterer unto Venerie, (A Bawd, I meane, to live by Fether-beds)].
1796		Grose Classical Dict. of the Vulgar Tongue (3rd edn) n.p.: The feather-bed jig; copulation.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

feather-bed lane (n.)

a notably rough road or track.

c.1698		B.E. Dict. Canting Crew n.p.: Feather-bed-lane, any bad Road, but particularly that betwixt Dunchurch and Daintrie.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.