yaw

(intransitive, aviation) To turn about the vertical axis while maintaining course.

(intransitive, nautical) To swerve off course to port or starboard.

(intransitive, nautical) To steer badly, zigzagging back and forth across the intended course of a boat; to go out of the line of course.

(intransitive) To rise in blisters, breaking in white froth, as cane juice in the clarifiers in sugar works.