What is the meaning of Stocker?

Livestock that is wintered and then sold in the spring; often contrasted with a feeder when the focus is on intended disposition.

A racecar in certain classes of auto racing whose origins are nominally or notionally related to factory-stock autos, such as stock car racing or super-stock drag racing.

One who crafts gun stocks.

One who stocks shelves with inventory.

One who supplies raw material to a machine.

to store (keep (something) while not in use)

to stock; to stock up

Source: wiktionary.org