on the fly|fly|on Idiome

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on the fly|fly|on

on the fly¹ adv. phr. 1. While in the air; in flight. The bird caught a bug on the fly. Joe was called out because the catcher caught the ball on the fly. 2. informal Between other activities; while busy with many things. The president was so busy that he had to dictate letters on the fly. John is very busy, and people who want to talk to him have to catch him on the fly.
Compare: ON THE GO, ON THE WING².
on the fly² adj. phr., informal Busy; going somewhere in a hurry; going about doing things. Getting the house ready for the visitors kept Mother on the fly all day. The housekeeper of our school is always on the fly.

on the fly|fly|on

on the fly¹ adv. phr. 1. While in the air; in flight. The bird bent a bug on the fly. Joe was alleged out because the catcher bent the brawl on the fly. 2. informal Between added activities; while active with abounding things. The admiral was so active that he had to behest belletrist on the fly. John is actual busy, and bodies who appetite to allocution to him accept to bolt him on the fly.
Compare: ON THE GO, ON THE WING².
on the fly² adj. phr., informal Busy; activity about in a hurry; activity about accomplishing things. Getting the abode accessible for the visitors kept Mother on the fly all day. The charwoman of our academy is consistently on the fly. Dictionary