- (intransitive, nautical) Of a vessel: to roll so far on its side that it cannot recover; to capsize or turn turtle.
- (intransitive, idiomatic) To collapse in a faint; to black out; to die.
- We should all go inside, before somebody keels over from the heat.
2017 July 16, Brandon Nowalk, “Chickens and dragons come home to roost on Game Of Thrones (newbies)”, in The Onion AV Club:
- Plucky old Walder Frey gathers his family for a feast and toasts to their massacre of the Stark family. He compliments their bravery in stabbing a pregnant woman and her fetus to death. As every last Frey man swigs their special wine, Walder hypes the cunning it took to invite guests into your home and ambush them. But then things take a turn, the men starting to keel over as Walder seems to admonish them for leaving certain threads hanging. At last the room is empty but for Arya Stark, holding Walder Frey’s face, and a couple girls she leaves alive to spread the legend. “Winter came for House Frey.”
of a vessel: to roll so far on its side that it cannot recover