ZIGZAG, v.t.
To move forward uncertainly, from side to side, as one carrying the white man's burden. (From _zed_, _z_, and _jag_, an Icelandic word of unknown meaning.)
He zedjagged so uncomen wyde Thet non coude pas on eyder syde; So, to com saufly thruh, I been Constreynet for to doodge betwene.
Munwele
--Ambrose Bierce - The Devil's Dictionary