What is the meaning of Willy?

Willing; favourable; ready; eager.

Self-willed; willful.

Alternative form of willow.

To cleanse wool or cotton, etc. with a willy, or willow.

A willow basket.

A fish basket.

the penis.

Term of abuse.

A person who is manipulated into serving as a useful agent without knowing it.

Source: wiktionary.org