Zigzag
The first turn a zigzag line makes is called a zig, and the second is called the zag. Zigzag can also be a verb. If you're describing how you got lost in the desert, you might say, "I meant to go straight, but then I zigged, and then I zagged." Serpentine describes a line that curves, but the curves are rounded , not short and sharp like a zigzag.
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