The name of the style is "boiling line" or "shimmering line". Line boil is the tendency of lines to wiggle around in hand-drawn animation. "Squigglevision" is a computer process that uses line boil to make the characters look lively and cut down on animation costs. Not all animation that uses line boil is made in Squigglevision; the vast majority is simply hand-drawn animation. Perhaps the trope needs to be renamed to "line boil" or "boiling line."
The name of the style is "boiling line" or "shimmering line". Line boil is the tendency of lines to wiggle around in hand-drawn animation. "Squigglevision" is a computer process that uses line boil to make the characters look lively and cut down on animation costs. Not all animation that uses line boil is made in Squigglevision; the vast majority is simply hand-drawn animation. Perhaps the trope needs to be renamed to "line boil" or "boiling line."