Discipline is on the wane in schools and colleges these days.

He has reached present position in his job through <u><em>elbow grease</em></u>.

Dog in the manger

His best jokes <u><em>fell flat</em></u>.

To throw up the sponge

To take the bull by the horns

To flog a dead horse

He was undecided. He <u><em>let the grass grow under his feet</em></u>.

The speaker gave a <u><em>bird's eye view</em></u> of the political conditions in the country.