/tad/ , n. Informal.
1. a small child, esp. a boy.
2. a very small amount or degree; bit: Please shift your chair a tad to the right. The frosting could use a tad more vanilla.
[ 1875-80, Amer., for def. 1; 1935-40, Amer., for def. 2; perh. shortening of TADPOLE ]