Green’s Dictionary of Slang

feeder n.

1. [18C–19C] (UK Und.) a (silver) spoon.

2. [1900s–20s] (US) the mouth or throat.

3. [1950s–70s] (US drugs) a hypodermic syringe.

In compounds

feeder-prigger (n.) [prigger n.1 (1)]

[late 18C–19C] (UK Und.) a thief specializing in silver spoons.