nutcracker

Noun

1. An implement for cracking nuts.

   1. (by extension) Ellipsis of nutcracker doll.

2. Any bird of the genus Nucifraga in the crow family.
3. A bootleg mixed drink made from a blend of alcohols and fruit juices.
   • The colorful bottles have popped up every summer in black and Hispanic communities — from the bodegas of Washington Heights to the stoops of Fort Greene — since the early 1990s. On beach boardwalks, at neighborhood...
4. Something that is difficult to figure out; a puzzle.
   • I hadn't been to school for a while so the math was a real nutcracker - 1978, The Laboregister, volume 2, Michigan Department of Labor, page 177:

   Synonyms: head-scratcher