Third-person singular simple present indicative form of walk the plank

present participle of walk the plank

plural of Copenhagen plank

An exercise where one of man’s lower extremities is put on an elevated surface (which contradistinguishes it from a mere side plank) and, posting the upper body on the opposing forearm, the ensuing maneuvering room is perused to charge the inner thigh of the other leg.

A type of bed consisting only of boards, and lacking a mattress.

plural of plank bed

(informal, simile) Very stupid.

(Canada, US, idiomatic, obsolete) A very fast speed. / (Canada, US, slang, obsolete, by extension) The quality of being "fast", i.e. immoral in one's habits.