'itty-bitty' definitions:

Definition of 'itty-bitty'

From: WordNet
adjective
(used informally) very small; "a wee tot" [syn: bitty, bittie, teensy, teentsy, teeny, wee, weeny, weensy, teensy-weensy, teeny-weeny, itty-bitty, itsy-bitsy]

Definition of 'itty-bitty'

From: GCIDE
  • itsy-bitsy \it"sy-bit"sy\, itty-bitty \it"ty-bit"ty\, a. very small; tiny.
  • Syn: bitty, bittie, teensy, teentsy, teeny, wee, weeny, weensy, teensy-weensy. [WordNet 1.5 + PJC]
  • It was an itsy-bitsy teeny-weeny yellow polka-dot bikini that she wore for the first time today. --Song lyrics [PJC]