When a grown man, either due to shyness, flirtation, being tickled or for other reasons related to becoming giddy, fails to laugh like an adultmale, 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.
OR
Joe exhibited a case of mangiggles while being tickled by his long-time girlfriend. She now "wears the pants" in the relationship.
A rare creature that is found in the woods of downeast Maine. It's sole purpose in life is to mate. It's glasses use thermal energy to identify females to try and seduce for the purpose of mating. Through years of evolution it is developed pasty white skin due to it no longer needing to go outside. While it's a simple creature, it's able to trick inferior creatures to hunt for it. It's diet primarily consists of Brandy and any food provided by its trickery. It's known for its unique trail of greasy residue it leaves anywhere it touches.
"I was outside drinking by the fire and I heard something it the woods, I think it might be a McGigglestein"
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.