Green’s Dictionary of Slang

shovel n.1

1. [1930s] (US) a banjo.

2. [1970s+] (US gay/prison) the penis.

In compounds

shovelhead (n.) [SE shovel + -head sfx (1)]

[1980s+] (Aus./US) an Asian.

shovel stiff (n.) (also pick-and-shovel stiff, shovel bum, ... flirt) [SE shovel + stiff n.1 (5a)/bum n.3 (1)]

[1900s–30s] (US tramp) a tramp who would beg but does it poorly and will therefore work (at a labouring job) when necessary.

SE in slang uses

In phrases

shovel of malt (n.) [SE malt, the main constituent of the drink]

[early 19C] a pot of porter.