Definition of "giddap" [giddap]

• Variant of giddyup. (interjection)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "With a loud "giddap" they started with a bound, missing Pepper by a hair's breadth, and driving on down the road at a rattling pace."
• "I have just been out beating the station engineer over his thick flat mushroom he uses for a head, telling him if my spaceship is not ready to leave tomorrow noon I will hitch him to it and say giddap."
• "Then some ends of the ropes were made fast to the little express wagon, and Bunny got in it, calling to Splash to "giddap!""