Green’s Dictionary of Slang

plate n.1

1. (orig. UK Und.) money.

[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: plate money, silver, prize [...] when the plate comes in, when money comes to hand.
[UK]Grose Classical Dict. of the Vulgar Tongue (3rd edn).
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[US]Matsell Vocabulum.
[Aus]Sydney Sportsman (Surry Hills, NSW) 8 Apr. 3/2: Dippers, when they rook a rocket / If the sack be brim of plate — / All they has to do is blew it .
[US]L.E. Ruggles Navy Explained 102: Sailormen [...] probably coin more words for money than any other body of men [...] Sheckles, iron men, washers, clackers, jack, cart wheels, simoleons, kopex, mazuma, palm grease, evil metal, oro, jingles, liberty, bait, sou, armor, plate, holy stones, joy berries, and many others.

2. (orig. US) a gramophone record [resemblance].

[UK]Vanity Fair (N.Y.) Nov. 38/1: None of these plates will be senders.
J. Bentley ‘Fifth Estate Vocab.’ AS XII:2 100: Behind the microphone they [i.e. gramophone records] are referred to variously as discs, E.T.’s, plates, platters, wax and cuts.
[US]P.E. Miller Down Beat’s Yearbook of Swing n.p.: hot circle or hot plate: hot phonograph record by a swing band.
[WI]F. Collymore Notes for Gloss. of Barbadian Dial. 88: Plate. Sometimes applied to a gramophone record.
[US]Kool G Rap ‘Road to the Richaes’ 🎵 Finally i got a break and cut my first plate.
[UK]Guardian Rev. 27 July 2: In parts of Africa they call records ‘plates’. Someone I met in the street might say: ‘Yeah, I’ve got some plates. Come and have a look’.

3. a record deck [resemblance].

[US]C. Cooper Jr Weed (1998) 178: He laid the piece by Lateef and Byrd onto the plate.

SE in slang uses

In compounds

plate-face (n.) [the perceived ‘flatness’ of some Asian faces]

(Aus.) a derog. term for an Asian, orig. Vietnamese.

[Aus]B. Moore Lex. of Cadet Lang. 272: plate face an Asian.

In phrases

drop plates (on this mother) (v.) [fig. use of SE + abbr. motherfucker n.]

(US black) to lose one’s temper, to get sufficiently annoyed to resort to physical violence.

[UK]Disturbed ‘Dropping Plates’ 🎵 Sickness [album] Because I’m coming fast / Planting thoughts in your mind / And dropping plates on your ass.
in for the plate [laboured derivation f. horseracing jargon: horses that qualify for the plate (the main race) have first won the heat; symptoms of VD include inflammation, i.e. heat]

suffering from venereal disease.

[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Plate. [...] He is in for the plate; he has won the heat, i.e. is infected with the venereal disorder: a simile drawn from horse-racing.
[UK]Lex. Balatronicum [as cit. 1785].
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
plate of straight (n.) [? SE straight, no trimmings]

(W.I.) a dish of boiled bananas.

[WI]cited in Cassidy & LePage Dict. Jam. Eng. (1980).
put it over the plate (v.) [baseball imagery]

(US) to achieve a success, a coup.

[US]H. Blossom Checkers 57: They’ve been laying dead with it all the meeting [...] but to-day [...] they’re going to put it over the plate.
[US]Commoner (Lincoln, NE) 2 Oct. 1/1: Suppose that Mr taft [...] should be approached by Mr Dupont thus: ‘I am one of the ten men [...] who have put you over the plate’ .
[US]Day Book (Chicago) 23 Oct. 28/2: [Of] all the editorials he [...] had ever penned [...] a few that Thomas put over the plate.