off the top of one's head
Without thinking hard; quickly.
Без раздумий, быстро, навскидку, первое что приходит в голову.
Vin answered the teacher's question off the top of his head.
When Lorraine was asked to recite, she talked off the top of her head.
Can you, off the top of your head, name any of your favorite rock songs?
Ты можешь навскидку назвать какую-нибудь из своих любимых рок-песен?
off the wagon
No longer refusing to drink whiskey or other alcoholic beverages; drinking liquor again, after stopping for a while.
When a heavy drinker quits he must really quit. One little drink of whiskey is enough to drive him off the wagon.
off the wall
off-the-wall
Strange; out of the ordinary; stupid.
He has been making off-the-wall remarks all day; something must he the matter with him.
off-again, on-again
on-again, off-again
Not settled; changeable; uncertain.
John and Susan had an off-again, on-again romance.
I don't like this off-again, on-again business. Are we going to have the party or not?
off-center
Different from the usual pattern; not quite like most others; odd.
Roger's sense of humor was a bit off-center.
off-color
off-colored
Not of the proper hue or shade; not matching a standard color sample.
The librarian complained that the painter had used an off-color green on the walls.
Not of the proper kind for polite society; in bad taste; dirty.
When Joe finished his off-color story, no one was pleased.
off-key
Not proper; queer.
When George told jokes at the funeral, everyone thought his action was off-key.
In a false key.
John always sings off-key.
offbeat
Nonconventional; different from the usual; odd.
Linguistics used to be an offbeat field, but nowadays every self-respecting university has a linguistics department.