English
Proper noun
Willy (plural Willys)
- A diminutive of the male given name William.
Noun
willy, willie (plural willies)
- (British; informal) Penis. Usually used by parents or children when speaking with children.
[the] willies
- (informal) A feeling of nervousness or fear. Staying in the haunted house gives me the willies.
Etymology
willy, willie
Possibly a contraction of membrum virile, a Latin term used in English in the nineteenth century. However, it is also possible that willy is simply the use of a proper name in English (Willy is a pet-name from William); cf. the vulgar usage of dick and fanny, which also derive from proper names.