Adverb
on the run or in a hurry
while in motion
Source: WordNeton-the-fly
Last night at the bar someone asked me to say something 'hot and sexy'. All I could think of on the fly was 'Hayden Christensen'. Ben Croshaw
I studied to be an architect. And I find tremendous similarities between building a company and the design process. Businesses have to do their planning on the fly in a fashion similar to an architect sketching. John Katzman
All us Youngs could throw. I used to kill squirrels with a stone when I was a kid, and my granddad once killed a turkey buzzard on the fly with a rock. Cy Young
When I give a lot of speeches, they're always on the fly. I mean, I know what I'm going to say roughly, but I do not - will not read. Vince Flynn
she wrote those letters on the fly Source: Internet
he caught the punt on the fly Source: Internet