One of a series of sharp turns or reversals: many zigs and zags in the mountain road; the zigs and zags of the stock market.
To turn or change direction suddenly. Usually used in contrast to zig: The runner zigged when he should have zagged.
To behave erratically or indecisively. Usually used with zig: zigging and zagging for years over the question of disarmament.
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.