When an person/animal is lying down & you run up to them, fart on their head, & leave the room.
"You should have seen the look on my cats face when I did a fly-by on him last night! He now twitches & I'm waiting for his left eyebrow to grow back! Priceless!"

"Dude, I did a fly-by on my mom yesterday! She didn't find it as funny as I did. Anyways, I can't come over, I'm grounded!"

Lassie: "Woof woof woof Timmy, woof woof fly-by woof, Fluffy, woof woof woof!"
by NoLongerStevesMcQueen! October 20, 2014
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To be fly is to be cool, and amazing and awesome.
Indigo Wallis and Anna Spaul are extremely FLY
by ahaaa1412 November 26, 2011
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A 90s adjective that needs to make a comeback like fresh or dope. Basically to describe something cool.
Yo that jacket is fly bro!!
by yursh22 May 17, 2017
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There is an art, or, rather, a knack to flying.
The knack lies in learning how to throw yourself at the ground and miss.

Pick a nice day, and try it.

The first part is easy.
All it requires is simply the ability to throw yourself forward with all your weight, and the willingness not to mind that it's going to hurt.

Clearly, it is the second part, the missing, which presents the difficulties. You have to miss the ground accidentally.

If you are lucky enough to have your attention distracted just in time, please take note of the following: ignore all consideratinos of your own weight and let yourself waft higher, do not listen to what anybody says to you at this point because they are unlikely to say anything helpful (They are most likely to say something along the lines of "Good God, you can't possibly be flying!" and it is vitally important not to believe them or they will suddenly be right). Waft higher and higher, try a few swoops, DO NOT WAVE AT ANYBODY.

Landing is another story.
Arthur Dent suddenly tripped and was hurled forward by his considerable momentum. But just at the moment he was about to hit the ground astoundingly hard he saw lying directly in front of him a small navy blue tote bag. In his astonishment he missed the ground completely and bobbed off into the air.
What Arthur was doing was this: he was flying.

See also: Life the Universe and Everything, Douglas Adams, The Hitchhiker's guide to the galaxy, and Arthur Dent
by Todd W December 7, 2006
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