Definition of "up-and-down" []

• Characterized by or exhibiting an alternating upward and downward movement. (adjective)
• Variable; changeable. (adjective)
• Vertical. (adjective)

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.

• "The 56-mile race takes place between the cities of Pietermaritzburg and Durban and covers five major hills, with the direction alternating each year—the so-called up-and-down runs."
• "He had survived purges, internecine battles within the Communist Party, bouts of internal exile and disfavor, the animosity of the Red Guards of the Cultural Revolution, and what could best be described as an up-and-down relationship with Mao."
• "And wwwww adequately imitated, in the manner of a newly devised pictogram, the up-and-down body motions of the laughing person."