tee ‧ ny wee ‧ ny /ˌtiːni ˈwiːni◂/ BrE AmE ( also teen‧sy ween‧sy /ˌtiːnzi ˈwiːnzi◂/) adjective informal
[ Date: 1800-1900 ; Origin: weeny 'very small' (1700-1800) from ⇨ ↑ wee 1 + tiny . teensy weensy 1900-2000 Probably from teeny weeny ]
a word meaning very small – used especially by children or when speaking to children