zigzaggedlyhttp://www.oed.com/dictionary/zigzaggedly_adv%3Ftab%3Dmeaning_and_usezigzaggedly, adv.
First published 1986; not fully revised

zigzaggedlyadverb

  1. 1921–
    Stressed as ˈzigzaggedly.
    1. 1921
      How zigzaggedly you talk. What has poetry to do with Mr Crimble?
      W. de la Mare, Memoirs of Midget xxxiii. 230
    2. 1977
      It [sc. a ball] rolled zigzaggedly for a while.
      R. Katz, Ziggurat vi. 55

Originally published as part of the entry for zigzagged, adj.

zigzagged, adj. was first published in 1921; not fully revised.