Wiggles

verb (used without object), wiggled, wiggling.
1.
to move or go with short, quick, irregular movements from side to side:
The puppies wiggled with delight.
verb (used with object), wiggled, wiggling.
2.
to cause to wiggle; move quickly and irregularly from side to side.
noun
3.
a wiggling movement or course.
4.
a wiggly line.
5.
a dish of creamed fish or shellfish and peas.
Idioms
6.
get a wiggle on, Informal. to hurry up; get a move on:
If you don’t get a wiggle on, we’ll miss the first act.
verb
1.
to move or cause to move with jerky movements, esp from side to side
noun
2.
the act or an instance of wiggling
3.
(slang, mainly US) get a wiggle on, to hurry up
wigger

[scientific computation] In solving partial differential equations by finite difference and similar methods, wiggles are sawtooth (up-down-up-down) oscillations at the shortest wavelength representable on the grid. If an algorithm is unstable, this is often the most unstable waveform, so it grows to dominate the solution. Alternatively, stable (though inaccurate) wiggles can be generated near a discontinuity by a Gibbs phenomenon.