A "giggle-fit" can be described as: an uncontrollable bout of laughter brought on by something hilarious, adorable, or a combination of both. It can also be described as: what you're about to experience while watching this adorable toddler try roaring.
When dressed in her new lion costume for the first time, this ferocious little animal gave an attempt at an intimidating roar, at the behest of her (understandably) laughing mom. What resulted was just plain cute, and the farthest thing from scary. (Unless you count scary-sweet, which would definitely apply!) Give the video a watch, and you'll wish all zoos were this stinkin' adorable.