On the fly means done without prior preparation.
"In slang, 'on the fly' means doing something quickly or spontaneously without much preparation or planning."
Cool itself, unless you are using it to mean mildly cold, is a slang word. Just because it is old slang doesn't mean that it is not still slang.
ColossalGinormousHumongousWhopper (can mean huge, or can mean a big lie)
"Slang ops" is a term that is commonly used in gaming and refers to slang operations or slang tactics. It can refer to a group of players using slang or casual language, or it can mean utilizing unconventional and creative strategies in a game.
The comparative form of "fly" is "flier" or "more flying."
In slang, "rubber" can refer to a condom.
"Fly" is slang for hip, modern, popular.
it's a slang way to say: stay cool :)
"fly" means cool (if your using slang term) so im guessing it would mean cool boy
The concept of "on the fly" is slang for quickly, rapidly, without having time to think it over. When one does something on the fly they do it on the spot right there.
Pants zipperor...In gangsta terms, it could be the equivalent to cool or hipex: "Yo that dude was pretty fly"Also in gangsta terms it could mean hot or sexyex: "That girl was mad fly"
The word "fly" is mainly used as a verb. However, it can be used as an adjective. It is used to mean quick-witted or well-dressed in slang terms.
If you mean slang as in internet slang, then it means "Certified Old Fart".
you so fly
Slang [British/Australian] for running around/being very busy. "I'm racing around like a blue-arsed fly - my plane leaves in 2 hours."
Garrett mean in cockney slang
Slang is slang It's the s' "LANG " uage.
Gibby fly brite (not 'bright')