FLYING, really?

Verb hang freely
Seeming to fly in the air, a US dance artist dangles on a rope during a performance in Delhi, India.
Verb to move with great speed
fly
The ski cross is a mad dash over clifflike jumps, around hairpin turns, through gullies and down steep slopes. Four racers fly down the course together, jostling for position at highway speeds.
Phrase be sold quickly and in large quantities
flying off the shelves
Doctor Barbie and Computer Engineer Barbie currently fetch top dollar, but Architect Barbie dolls aren’t flying off the shelves because it’s not as glamorous or as lucrative of a profession for women.
Phrase to be someone who can secretly see and hear what is happening
fly on the wall
I'd love to be a fly on the wall when those two get home!
Phrase to express yourself in a way that excites or angers others
let fly
Everyday on Reddit, millions let fly with cat pics, tales of social awkwardness and Star Trek references. This is the war for "karma points": the crucial upvotes and downvotes that govern how content is displayed on the site.