Gum

A chewy, sticky wad of flavored sugar (or sorbitol or xylitol if it's sugar-free, smarty-pants) that may come as a ball, a stick, a cube, a 6-foot strip in a pink plastic dispenser, etc. Typically flavored as either classic bubblegum, a fruit (juicy fruit, strawberry, watermelon, orange, kiwi, pineapple, dragonfruit, etc.), or some kind of mint (peppermint, spearmint, wintergreen, winterfresh, sweetmint, smooth mint, polar ice, fresh mint; the list goes on. What's the difference? Don't ask me.). Common uses include sticking it under desks, putting it in people's hair, playing with it as slime, using it as a currency/bribe, breath freshener, etc.