Green’s Dictionary of Slang

plaster v.

1. to bet (heavily) on.

[UK]Sporting Times 11 Jan. 2: [He] plastered down his brass, and if he had not got brass his credit, and if he hadn’t got credit, went and found a juggins to back Caerau for the Getting Home Stakes.
[UK]Sporting Times 7 Mar. 1/5: The Antipodean Gambleress plastered down the shekels.
[UK]R. Westerby Wide Boys Never Work (1938) 32: That was my cousin’s dog you saw to-night. Molly’s Boy. We came down here to plaster it.

2. to hit.

[UK]‘Sapper’ Human Touch 96: Zonnebeeke was plastered.
[UK]J. March Wild Party 60: That guy ought to be plastered!
[US]W.R. Burnett Iron Man 11: I’m gonna plaster that nigger.
Sikeston (MO) Herald 26 Dec. 7/7: Plastererd (to be) – Still more bombing.
[US]L. Uris Battle Cry (1964) 419: George Company is getting plastered.
[Ire]P. Boyle At Night All Cats Are Grey 96: You keep out of this or I’ll plaster you to the wall.
[NZ]G. Newbold Big Huey 91: If I ever bump into you in the airstrip I’m going to plaster you all over the floor.

3. (US black) to shoot someone.

[US]R. Klein Jailhouse Jargon and Street Sl. [unpub. ms.].

In derivatives

plastering (n.)

(US) a severe beating.

[US]D. Runyon ‘A Tale of Two Fists’ XXVIII in Pittsburgh Press (PA) 16 June 23/3: Moran [...] got a royal American plastering.

In phrases

plaster over (v.)

(Irish) to persuade.

[Ire]P. Boyle At Night All Cats Are Grey 40: There was none of this talk when you were plastering over me to have you. Oh, you made promises then no end!