Move erratically is an expression that describes a type of movement that is unpredictable and often changes direction quickly. The crossword solutions for this term are ZIGZAG (6 letters), FLIT (4 letters), and zag (3 letters). ZIGZAG is a pattern of movement that involves alternating between two directions, usually at sharp angles. FLIT is a verb that means to move quickly and lightly in a way that is difficult to follow. Zag is a verb that means to move in a ZIGZAG pattern.