donut

Etymology

Alteration of doughnut, from dough + nut. Attested 1900.

noun

1. (chiefly Canada, US) A deep-fried piece of dough or batter, commonly made in a toroidal or ellipsoidal shape, and mixed with various sweeteners and flavors, sometimes filled with jelly, custard, or cream.
   […]Pa said he guessed he hadn't got much appetite, and he would just drink a cup of coffee and eat a donut. 1900, George Wilbur Peck, Peck's bad boy and his pa, Stanton and Van Vliet, page 107
2. (chiefly Canada, US) Anything in the shape of a circle or torus.
   The Long Lances, however, were thick in the water, and soon Portland was hit in the stern, sending her turning donuts across the ocean trying to work out which way to point her guns, popping off occasional shots at Hiei, which, by now, was heavily ablaze and a very obvious target in the night. 10 March 2021, Drachinifel, 20:44 from the start, in Guadalcanal Campaign - The Big Night Battle: Night 1 (IJN 3(?) : 2 USN), archived from the original on 2022-10-17
3. (Canada, US, automobile) A peel-out or skid-mark in the shape of a donut; a 360-degree skid.
4. (Canada, US) A spare tire, smaller and less durable than a full-sized tire, only intended for temporary use.
5. A toroidal cushion typically used by hemorrhoid patients.
6. (Canada, US, slang) An idiot.
   Nice going, you donut!