Well obviously the 13-year-old dipshit idiots are having a field day...
They're birds of the family Cacatuidae, order Psittaciformes; in other words, they're parrots. They're mostly found in Australia and its surrounding territory. The mid-sized, yellow-crested, white-feathered bird you see in fiction is just one species, but it is the most common one.
You have a pet cockatiel? That's the smallest genuine species of cockatoo, and the easiest to tame; the others are more difficult to domesticate, and probably not worth your time unless you know your stuff.
tl;dr cockatoos are Australian parrots, not whatever other shitty definition a bunch of brain-deprived prepubescent boys made up on the spot.
Cockatooing is a syndrome that effects nearly 100% of the male population. It is the act where one always finds himself holding long objects to where is cock is to simulate/emulate a cock. Common long objects include bananas, knives, machetes, blocks of cheese, sausages, remotes, carrots, lobster, egg rolls, etc...
"Yo stop cockatooing with my lobster!"
"Dude you really need to work on your cockatooing problem"
"Dude I really wish I could cockatoo that ships mast!"
A specialtype of douche bag that loves to run his mouth because it's way bigger than his cock
Hey Larry, why don't u step the fuck up and actually throw down. Maybe if your dick was bigger than your mouth you wouldn't run it so much you cockadoodledouchebag!