wobble v.

late 13c., weyveren, "to show indecision," probably related to Old English wæfre "restless, wavering," from Proto-Germanic *wæbraz (source also of Middle High German wabern "to waver," Old Norse vafra "to hover about"), a frequentative form from the root of wave (v.), with Germanic verbal suffix indicating repeated or diminutive action (see -er (4)). Related: Wavered; wavering.

"nauseated feeling, disordered indisposition in the bowels," 1823, probably a fanciful formation from colic and wobble. Perhaps suggested by cholera morbus.