donut hole

plural donut holes · alternative doughnut hole

1. The empty space in the center of a donut.
2. CanadaUSA small, ball-shaped pastry, made in the same manner as a donut, roughly the size of the hole in a donut.

   These donut holes are delicious!

   Synonyms: munchkin, timbit

3. USslangwelfarebusinessAn income bracket in which an individual is ineligible for benefits, despite such benefits being available to those in both the immediately lower and higher income brackets.

   Very few younger Americans have probably ever heard of the “donut hole” in Medicare's prescription drug program, but if you're on Medicare and need expensive drugs it's likely you have.

   2012, Nick Tate, ObamaCare Survival Guide: The Affordable Care Act and What It Means for You and Your Healthcare, page 138

4. informalfishingA body of water in which no entity holds fishing rights, entirely enclosed by adjacent regions where such rights are legally allocated to various parties.
5. slangThe anus.