To indulge in loud, continued laughter; to laugh immoderately.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
v. laugh loudly and in an unrestrained way
Word Usage
"I think I shall have a mighty awesome night tonight .... and may even tell u all about it tomorrow ... (hmm perhaps not ALL) * cachinnate* relinquished - curiosity"