zigzagger

noun

1. An attachment for a sewing machine allowing for zigzag stitches.

   “Join the pieces with overlapping seams and finish off by stitching with the zigzagger attachment.”

   “If a woman had the finest conventional sewing machine with all the attachments ever made, she could not do one tenth of the work that can be done on a modern zigzagger.”

2. Someone who zigzags; a person who makes rapid changes of direction, especially (figuratively) in opinion, policy etc.

   “That is what has long worried many people about Nixon: they saw him as the political man, the born trimmer, the zigzagger and flipflopper, the constantly moving target”

   “As a self-avowed 'zigzagger' who works back and forth between historical particularities and sociological categories,”

   “In the view of Greenberg and his colleagues, Clinton […] was a zigzagger who tailored his views to suit voters.”