from The American Heritage® Dictionary of the English Language, 4th Edition
- n.pl. Slang Feelings of uneasiness. Often used with the: The dark, dank cave gave me the willies.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of willy.
- n. A feeling of nervousness or fear.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. feelings of uneasiness
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
The meaning "spell of nervousness," recorded since 1896, stems perhaps from the woollies, a dialectal term for "nervous uneasiness," probably in reference to the physical itchiness of wool garments. (Wiktionary)