|off the shelf
||from the store shelf, run of the mill
||It isn't a special gift, just an off-the-shelf radio with batteries.
|off the top of my head
||without thinking carefully, off the cuff
||Off the top of my head, I believe the US has 50 states.
|off the wagon
||drinking again, drunk again
||He's off the wagon again. He started drinking last night.
|off the wall
||unrelated, unusual, off topic
||His idea of selling time is really off the wall - quite strange.
|off to a bad start
||not a good start, a poor beginning
||The class got off to a bad start because the teacher was sick.
|off to a good start
||a successful beginning, away to the races
||Jim's off to a good start in math. He has the basic skills.
|off to the races
||moving quickly ahead, off to a good start
||When we get our business loan, we'll be off to the races.
||not on the chosen topic, not related to the topic
||If you're writing about dogs, flowers are off topic.
||remove clothing or a covering
||Off with your overcoat, Ben. Stay and visit awhile.
|off with you
||leave, go, skidaddle
||Off with you, girl, or you'll be late for school.