When a grown man, either due to shyness, flirtation, being tickled or for other reasons related to becoming giddy, fails to laugh like an adult male, and instead can only muster a series of giggles containing effeminate qualities.
Michael broke into an embarrassing bout of mangiggles after being asked on a date by an attractive woman he had long desired.
Joe exhibited a case of mangiggles while being tickled by his long-time girlfriend. She now "wears the pants" in the relationship.
(Fantasy-Sport Induced Emotional Discord) The emotional discord one experiences when the interests of their fantasy team are juxtaposed to those of the actual team one normally supports.
Tim, a Chargers fan, was experiencing a severe amount of F.I.E.D. (pronounced "fide") while watching Phililip Rivers pass for a career-high amount of yardage, because his opponent in fantasy football that week was benefitting from Rivers' great game.