turn turtle

She careened so badly that the girls shrieked and Malcolm himself thought she would turn turtle.

How she didn't turn turtle is known only to Allah and Maturin; and One is great and the other's a damned fine sailor.

Almost every man aboard was thrown to the deck, and the vessel heeled over to starboard until it seemed she must turn turtle.

Jim felt she was about to turn turtle and promptly threw himself on to the edge of the car, endeavouring to weigh her down.

Let the ship turn turtle and go down, and at least the pang is over.