Something (usually food or a drink) that tastes really good. Taken from the movie BFG, where he makes a nice comment about eating eggs and toast provided by the Queen of England.
"MMMM! There's only one word for that, Majester. Scrumdiddlyumptious. Oh, that is GLUMMY." - The BFG while enjoying his enormous egg and toastbreakfast.
A stomach ache brought on by the consumption of large ammounts of gummy worms, gummy bears, and/or other gummies.
Gummy tummy has a distinctive feeling, unlike that of any other food related stomach ache.
Mark ate a whole tub of gummy worms. Dude had severe gummy tummy after that.
Sugar free gummy bears are the reason your ass will turn into a brown Niagara falls. After eating about 20 of them all hell brokeloose in my bowels. In my bowels, something was happening that I never imagined could have happened to me. Sweating, cramps, bloating. I've ate Indian curry, and the end result was like smelling daisies in a meadow compared to the end result of eating sugar free gummy bears. Then came the flatulence, DEAR GOD THE FLATULENCE. The sounds were like trumpets calling demons from the pit of hell. The stench was worse than that of a thousand rotting corpses. One more minute in that bathroom and I would have died of choking on my own putrid fumes. What came out of me felt like someone trying to funnel Niagara falls through a coffee straw. AND IT LASTED FOR HOURS. I felt so violated when it was over.
Dude 1: I just ate some sugar free gummy bears, and they wur pretty good.
Dude 2: You are going to be in the bathroom for a long, long time Dude 1: No I'm not
*one hour later*
Dude 1's asshole: *water fall sounds*
Dude 1: OH GOD WHY!!!!!!!!!!!!!!