English

a boat that has turned turtle

Verb

turn turtle

1. To turn upside down. Commonly used for boats and ships that capsize and turn through 180° so their hulls are above their superstructure, but it can refer to any vehicle in a similar position.
2. (surfing) To roll upside-down with one's surfboard (usually a longboard) to allow a wave (usually an already broken wave) to pass over.

See also

• upside down
• eskimo roll