waggle
Waggle (verb) means to move something with brief, rapid motions; to shake unsteadily.
Etymology
Comes from Middle English wagelen (attested in wagelyng), possibly borrowed from Middle Low German wagelen; equivalent to wag + -le (“(frequentative)”). Compare the continental equivalents Middle High German wacken (which gives Danish vakle and German wackeln), Swedish vagla, West Frisian waggelje, Low German wackeln, and Dutch waggelen.