AMERICAN IDIOMS (O)
Odd man out:
An unusual or atypical person (or thing). ex. "In a high school where everyone was tough, I was the odd man out."
Rude; vulgar. ex. "I'm not a big fan of the off-color jokes he loves to tell."
Not working at one's job. ex. "The policeman couldn't help me because he was off-duty."
Off the air:
No longer on TV (or the radio). ex. "They took that show off the air in November because nobody watched it."
Off the hook:
No longer having to do something, no longer blamed or under suspicion. ex. "Ok, you're off the hook. Your brother says he'll clean the bathroom."
Off the record:
Unofficially. ex. "Off the record, they were very displeased with the way the CEO was conducting himself."
Off the top of one's head:
Spontaneously; without thinking too much. ex. "P1: How many cafes are there in this town? P2: Off the top of my head, I can think of about 6."
On one's mind:
Occupying someone's thoughts; being thought about. ex. "You were always on my mind."
(To do something) on one's own accord:
Willingly, without anyone forcing one to do something. ex. "P1: Did you make him apologize? P2: No, he did it on his own accord."
On second thought:
Having given something more thought. ex. "On second thought, maybe you should sell your house and move into an apartment."
On the go:
Busy. Moving around busily. ex. "Jim is always on the go. He can never find time to talk to me."
On the house:
Something that is given away free by a merchant. ex. "P1: How much for the apple? P2: Nothing, it's on the house!"
On the loose:
(Most often used speaking about criminals) - free; not captured; ex. "The bank robbers are still on the loose."
On the tip of one's tongue:
Something that is almost said/remembered. ex. "I've got his name on the tip of my tongue."
On the wagon:
Not drinking alcohol. ex. "P2: Hey let's go out for a couple of beers tonight. P2: I can't, I'm on the wagon."
Once in a while:
Occasionally. ex. "Once in a while I'll pick up my old guitar and play a couple of tunes."
Other side of the tracks
The poorer part of a town.
Unconscious. ex. "The boxer was out cold."
Out of sorts:
Not quite oneself; In a bad/strange mood. ex. "Tom has been out of sorts recently."