cachinnate

1. (intransitive) To laugh loudly, immoderately, or too often.Examples: "The villain began to cachinnate and twirl his moustache."; "There is a sense of spectral whirling through liquid gulfs of infinity, of dizzying rides through reeling universes on a comet’s tail, and of hysterical plunges from the pit to the moon and from the moon back again to the pit, all livened by a cachinnating chorus of the distorted, hilarious elder gods and the green, bat-winged mocking imps of Tartarus."Synonyms: guffawintransitive