from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Informal Very small.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Alternative form of itsy-bitsy.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (used informally) very small
Probably alteration of little bit.(American Heritage® Dictionary of the English Language, Fourth Edition)