offhand
Informal; casual; careless.
Dick found Bob's offhand manner inappropriate for business.
In an improvised fashion.
Offhand, I would guess that at least five thousand people attended the festival.
offshoot
A derivative; a side product.
The discovery of nuclear reactors was an offshoot of research in quantum physics.
out of bounds
off limits
Outside of the boundary lines in a game; not on or inside the playing field.
Bill thought he had scored a touchdown, but he had stepped out of bounds before he reached the goal line.
Outside of a circumscribed area for a certain kind of work, such as construction or military site.
The principal told the students that the new gymnasium being built on the school grounds was out of bounds.
The captain's cabin is out of bounds to the passengers on the ship.
Outside of safe or proper limits; not doing what is proper; breaking the rules of good behavior.
John was out of bounds when he called Tom a liar in the meeting.
His request for a 25% salary raise was totally out of bounds.
out of one's head
out of one's mind
out of one's senses
off one's head
Acting in a crazy way; especially, wildly crazy.
The patient was feverish and out of his head and had to be watched.
Her friends thought she was out of her mind to marry that man.
pack off
To send away; dismiss abruptly.
When an Englishman got in trouble long ago, his family would pack him off to Australia or some other distant land.
Jane couldn't really get started on her homework until she had packed the children off to school.
pair off
To make a pair of; put two together; associate; match.
Mrs. Smith paired off her guests by age and tastes.
To belong to a pair; become one of a pair.
Jane paired off with Alice in a tennis doubles match.
To divide or join into pairs.
Later in the day the picnic crowd paired off for walks and boat rides.
palm off
To sell or give (something) by pretending it is something more valuable; to sell or give by trickery.
He palmed off his own painting as a Rembrandt.
The salesman palmed off pine wood floors as oak.
To deceive (someone) by a trick or lie.
He palmed his creditors off with a great show of prosperity.
To introduce someone as a person he isn't; present in a false pretense.
He palmed the girl off as a real Broadway actress.
pass off
To sell or give (something) by false claims; offer (something fake) as genuine.
The dishonest builder passed off a poorly built house by pretending it was well constructed.
To claim to be someone you are not; pretend to be someone else.
He passed himself off as a doctor until someone checked his record.
To go away gradually; disappear.
Mrs. White's morning headache had passed off by that night.
To reach an end; run its course from beginning to end.
The party passed off well.