tooth fairy
US /ˈtuːθ ˌfer.i/
UK /ˈtuːθ ˌfer.i/
1.
a mythical creature who gives children money or a small gift in exchange for a lost baby tooth, which is placed under a pillow
:
•
My daughter was so excited when the tooth fairy left her a dollar for her first lost tooth.
•
Many children believe in the tooth fairy.