D defs.my
Entry 1 sense Webster, 1913

itsy-bitsy

/ĭtˌ-sēb-ĭt'-sē/ · it·sy-bit·sy · IPA /ˈɪtsi ˈbɪtsi/
01 a. very small; tiny.
  1. 1.
    very small; tiny.
    “It was an itsy-bitsy teeny-weeny yellow polka-dot bikini that she wore for the first time today.” — Song lyrics