cachinnate

[v] - laugh loudly and in an unrestrained way
Found on http://www.webdictionary.co.uk/definition.php?query=cachinnate

cachinnate

verb laugh loudly and in an unrestrained way
Found on http://wordnetweb.princeton.edu/perl/webwn?s=cachinnate

cachinnate

to laugh loudly and inappropriately
Found on http://phrontistery.info/c.html
No exact match found