Typo of NGL... or was it? The keys aren't that close to each other on the keyboard...
There are two very different meanings for this word...
1. The duck is a bird in the water that can fly. THEY AREN'T LIKE PENGUINS WHO CAN'T FLY.
2. A squatting position used to evade danger.
Wow, duck! It's flying towards us!
Whoa, DUCK! IT'S FLYING TOWARDS US!!!
Noun: A type of animal
Verb: To squat in order to dodge something
Duck! That's a really pretty Duck!
Duck! That's a deadly bullet shooting to you!