on the air
Broadcasting or being broadcast on radio or TV.
His show is on the air at six o'clock.
The ball game is on the air now.
on the alert
Alert; watchful; careful.
Campers must be on the alert for poison ivy and poison oak.
Drivers must be on the alert for traffic signals.
on the bandwagon
climb on the bandwagon
jump on the bandwagon
get on the bandwagon
In or into the newest popular group or activity; in or into something you join just because many others are joining it. Often used after climb, get, or jump.
When all George's friends decided to vote for Bill, George climbed on the bandwagon too.
To join a popular cause or movement.
At the last possible moment, the senator jumped on the winning candidate's bandwagon.
on the beam
Of an airplane. In the radio beam that marks the path to follow between airports; flying in the right direction.
A radio signal tells the pilot of an airplane when he is flying on the beam.
Doing well; just right; good or correct.
Kenneth's answer was right on the beam.
on the bench
Sitting in a law court as a judge.
Judge Wyzanski is on the bench this morning.
Sitting among the substitute players.
The coach had to keep his star player on the bench with a sprained ankle.
on the blink
Faulty; malfunctioning; inoperative.
I need to call a competent repairman because my computer is on the blink again.
on the block
To be sold; for sale.
The vacant house was on the block.
Young cattle are grown and sent to market to be placed on the block.
on the brain
Filling your thoughts; too much thought about; almost always in mind.
Mary Ann has boys on the brain.
Joe's hobby is ham radio and he has radio on the brain most of the time.