Green’s Dictionary of Slang

smasher n.1

[smash v.2 (1)]
(UK Und.)

1. [late 18C–1910s] (also bit(t) smasher) one who makes or passes counterfeit money.

2. [mid-19C] in fig. use, one who commits a libel.

3. [1920s] a receiver of stolen goods.

4. [1940s] a receiver who specializes in buying and recycling stolen money.