nutcracker

1. (ornithology) Any bird of the genus Nucifraga in the crow family.

2. (US, New York City) A bootleg mixed drink made from a blend of alcohols and fruit juices.Examples: "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 basketball courts and block parties, New Yorkers are drinking nutcrackers, boozy homespun cocktails made from a blend of alcohol and fruit juices."New-York-CityUS

3. (informal) Something that is difficult to figure out; a puzzle.Examples: "I hadn't been to school for a while so the math was a real nutcracker"informal