Green’s Dictionary of Slang

wedge n.1

1. [18C+] (also wage) silver, money in general.

2. [18C–1910s] silver plate.

3. [mid-18C] (UK Und.) a silver buckle.

4. [late 19C] (UK Und.) a receiver [? backsl. Jew; ? the silver plate was melted down into wedges by receivers].

5. [1970s+] a thick, chunky roll of banknotes, usu. folded in half; thus a large amount of money or wealth in general.

6. in specific use of sense 5, a bribe.

In compounds

wedge-hunter (n.)

[mid-19C–1900s] (UK Und.) a thief specializing in silver plate and silver watches.

wedge-hunting (n.)

[late 19C] (UK Und.) stealing silver-plate or silver watches.

In phrases

flash the wedge (v.)

[19C] (UK Und.) to dispose of one’s ‘swag’ or booty.

wedged (adj.)

1. [early 19C] abundant in silver, e.g. of table decorations.

2. [1990s+] (also wedged up) well-off, rich.

wedge up (v.)

1. [2000s] to amass money.

2. to hand over money.

SE in slang uses

In compounds

wedgeass (n.) [SE wedge + -ass sfx]

[1940s–50s] (US) a general term of abuse; thus wedge-assed adj.

wedgehead (n.)

[1990s+] one who has a ‘wedge’ haircut; also attrib.