Hawning is a Hair Awning. It's like a comb-over, except it stems from a receding hairline. The hair at the hairline is grown long and then combed forward causing an awning effect.
When thinking of all the AGW pseudoscience swallowed by the GAC (Global Alarmist Church ... pronounced as G-A-C-K-K-K-K !!! with a gutteral ending as if you have a throat clogged with nasty phlegm and you are "hawking a loogie") you get an overwhelming involuntary reflex to spit on the nearest climatologist).
An uncommon, yet unfortunate result of a throw during beer pong where the ball will spin around the rim of the cup, then be ejected out of said cup. The physics of this action are puzzling, some thinking that the ball enters a black hole and then reappears, falling out of the cup. Who knows how it works, apart from Stephen? But it sucks majorly when you lose because each shot results in the swirl.
The act of flying a Blackhawk helicopter whilst erratically changing altitudes and airspeeds causing difficulty for subsequent chalks to maintain any type of formation flight that would resemble that of a professional Army/Navy/Air Force Aviator.
Did you see Carl in flight lead last night? He was hawking so bad we almost got sick!