A villainous laugh so remarkably stupid-sounding that, instead of striking fear into the hearts of those who hear it, it causes bouts of uncontrollable sniggering. This may or may not have been done on purpose. Contrast Giggling Villains, whose seemingly unimpressive laughs only make them creepier. Compare Laugh with Me in which the villain demands that someone laugh as well.
Examples [tvtropes.org]