Green’s Dictionary of Slang

pod n.1

[orig. dial.]

a large stomach.

[UK]Farmer & Henley Sl. and Its Analogues.
[US]P. Wylie Generation of Vipers 164: The whole world of man knows that to grow thinner you need only eat less and take more exercise and if you cannot do that, it’s generally your head, not your pod, that needs attention.

In phrases

in pod (adj.)

pregnant.

[UK]Barrère & Leland Dict. of Sl., Jargon and Cant.
[UK]‘Suzan Aked’ The Simple Tale of Suzan Aked 155: ‘Oh Clara! [...] are you in pod?’.
[UK]G.R. Bacchus Pleasure Bound ‘Ashore’ 10: ‘There was a young man of Cape Cod, / Who put his best girl into pod’.
[Ire]Joyce Ulysses 374: Hereupon Punch Costello dinged with his fist upon the board and would sing a bawdy catch Staboo Stabella about a wench that was put in pod of a jolly swashbuckler.
[US] in G. Legman Limerick (1953) 188: There was a young man of Cape Cod / Who once put my wife into pod.
[UK]K. Amis letter 22 Dec. in Leader (2000) 268: So Patsy’s in pod, eh? [...] she is the worst-equipped person to be a parent I’ve ever met.
[NZ]R.M. Muir Word for Word 254: Mind you, she was in pod.
[UK]P. Larkin ‘The Life with a Hole in it’ in Coll. Poems (1988) 202: (Six kids, and the wife in pod, / And her parents coming to stay).
[UK]Indep. Rev. 1 Oct. 5: Tony’s wife is in pod.