Словарь американских идиом: 8000 единиц

[on the dole]{adv. phr.} Drawing unemployment benefits. •/When Jim lost his job he got on the dole and is still on it./

[on the dot] also [on the button]{adv. phr.}, {informal} Exactly on time; not early and not late. •/Susan arrived at the party at 2:00 P.M. on the dot./ •/Ben’s plane arrived on the dot./

[on the double!]{adv. phr.} Hurry up! •/"Let’s go! On the double!" the pilot cried, as he started up the engine of the small plane./

[on the eve of]{prep.} Just before (an event). •/On the eve of the election, the president proposed a plan to cut taxes./

[on the face of it]{adv. phr.} Apparently; as it seems. •/On the face of it, Joe’s claim that he can swim five miles is true./ •/His statement that he is a millionaire is, on the face of it, false./

[on the fence]{adj.} or {adv. phr.} Not able, or not wanting to choose; in doubt; undecided. — Often used with "sit". •/Jack sat on the fence for a week last spring before he finally joined the track team instead of the baseball team./ •/Mrs. Jones has decided to vote for the Democrats, but Mr. Jones is still on the fence./ See: FENCE-SITTER or FENCE-SITTING.

[on the fly(1)]{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 WING(2).

[on the fly(2)]{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 go]{adj. phr.}, {informal} Active and busy. •/Successful businessmen are on the go most of the time./ •/Healthy, happy people are usually on the go./ Compare: ON THE MOVE.

[on the heels of]{prep.} Just after; following (something, especially an event). — Often used with "hard" for emphasis. •/Hard on the heels of the women’s liberation parade, homosexuals declared a "gay pride week."/

[on the hog] See: LIVE HIGH OFF THE HOG or EAT HIGH ON THE HOG.

[on the hour]{adv. phr.} Each time the hour has zero minutes and zero seconds. •/The uptown bus goes past the school on the hour./ •/The woman must take her pill on the hour./

[on the house]{adj. phr.}, {informal} Paid for by the owner. •/At the opening of the new hotel, the champagne was on the house./ •/Oscar was the first customer at the diner, so his lunch was on the house./

[on the increase] See: ON THE WAX. Contrast: ON THE DECREASE, ON THE WANE.

[on the job]{adj. phr.}, {informal} Working hard; not wasting time. •/Joe was on the job all of the time that he was at work./ •/The school paper came out on time because the editors were on the job./

[on the knees of the gods] See: IN THE LAP OF THE GODS.