a rapid dive by a submarine made at a steep angle, esp. to avoid attack from a surface vessel or airplane.
crash-divePronunciation: (krash'dīv', -dīv"), [key]
—v.i., v.t., -dived or -dove, -dived, -div•ing.
to dive rapidly at a steep angle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.