Green’s Dictionary of Slang

hot; lit. or fig., i.e. hot adj.

1895		Derby Mercury 9 Jan. 8/3: Big Tim says, 'you are very peas in the pot (rhyming slang for 'hot', otherwise impudent) the Mug bunged you a bit more than that'.
1899		A. Binstead Houndsditch Day by Day 82: Young Yids [...] as thinks it smart to kid the laundress to wash the bosoms on’y of their shirts, an’ charge ’em twopence, so’s to leave twopence for a gardenia button-’ole. Oh, they’re very peas-in-the-pot.
1903		A. Binstead Pitcher in Paradise 37: George was most distinctly whatever they called ‘a bit peas-in-the-pot’ in 1825.
1908		Sporting Times 8 Feb. 8/5: Knowing you’re a bit peas in the pot on anything that’s too near the knuckle, gov’nor.
1909		J. Ware Passing Eng. of the Victorian Era 194/1: Peas in the pot (Low London). Rhyming phrase – meaning ‘hot’, erotic.
1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 220: Peas In The Pot: Hot.
1932		‘P.P.’ Rhy. Sl.
a.1945		L. Payne private coll. n.p.: Hot Peas in the Pot.
1956		‘Charles Raven’ Und. Nights 21: They were too good altogether, too peas-in-the-pot – hot.
1960		J. Franklyn Dict. of Rhy. Sl. 106/2: Peas in the pot Hot. This term [...] is nearly always reduced to peas, and used in reference to the female’s sexual avidity: as ‘She’s peas’.
1968		J. Alard He who Shoots Last 218: Me old man sure told a yarn well. Though I remembers me mudder comin’ in an’ tellin’ him ta break it down a bit cause I wuz kinda young. S’pose it wuz a bit peas in da pot.
1969		S.T. Kendall Up the Frog 11: I’m takin’ me I’m afloat orf, its proper peas in the pot in ’ere.
1971		J. Jones Rhy. Cockney Sl.
1983		J. Byrell (con. 1959) Up the Cross 64: They’d drum you that [...] when the weather got a bit peas-in-the-pot, she took to plastering herself [etc].
2001		M. Coles Bible in Cockney 61: When the Bath bun was high up in the sky, it became well peas.
2002		D. Shaw ‘Dead Beard’ at www.asstr.org 🌐 By now I’m seriously peas in the pot, and it’s got nothing to do with the Caribbean currant bun.