zag (zāg) n. 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. intr.v.
zagged, zag·ging, zags
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.