|on speaking terms
||not friendly but saying hello etc.
||Louise and I are not friends, but we're on speaking terms.
||available from the tap on a keg of beer or ale
||There was a red neon sign in the window: COLD BEER ON TAP
||done by the planned date, on schedule
||If we can complete the drawings by Monday, we'll be on target.
||carefully, cautiously, afraid to move
||He's cautious since his accident. He drives around on tenterhooks.
|on the back burner
||to be done later, not as important
||The playground project is on the back burner until next spring.
|on the ball
||smart, intelligent, bright, sharp
||Max has a lot on the ball. He can solve our problem.
|on the bandwagon
||helping, supporting, on side
||Get on the bandwagon, folks! Our man is going to be Premier!
|on the beat
||on the job, working, doing a task or assignment
||A journalist must be on the beat, working among the people and telling their stories.
|on the books
||listed, accounted for
||Is it legal to sell items that aren't on the books - that aren't listed?
|on the bright side
||Chan is positive. He always looks on bright side of things.