give oneself away
To show guilt; show you have done wrong.
The thief gave himself away by spending so much money.
Carl played a joke on Bob and gave himself away by laughing.
give oneself up to
Not to hold yourself back from; let yourself enjoy.
Uncle Willie gave himself up to a life of wandering.
John came inside from the cold and gave himself up to the pleasure of being in a warm room.
give oneself up
To stop hiding or running away; surrender.
The thief gave himself up to the police.
Mr. Thompson hit another car, and his wife told him to give himself up.
go chase oneself
Go away and stop being a nuisance.
John's father was busy and told him to go chase himself.
The owner of the store told the boys in front to go chase themselves.
have oneself
To enjoy. Sometimes used in very informal speech to provide emphasis.
As soon as their parents left, the boys had themselves some fun.
After working hard all day, John had himself a good night's sleep.
help oneself
To take what you want; take rather than ask or wail to be given.
Help yourself to another piece of pie.
John helped himself to some candy without asking.
in a world of one's own
in a world by oneself
In the place where you belong; in your own personal surroundings; apart from other people.
They are in a little world of their own in their house on the mountain.
In deep thought or concentration.
Mary is in a world of her own when she is playing the piano.
Not caring about or connected with other people in thoughts or actions. Usually used sarcastically.
That boy is in a world all by himself. He never knows what is happening around him.
kick oneself
To be sorry or ashamed; regret.
When John missed the train, he kicked himself for not having left earlier.
Mary could have kicked herself for letting the secret out before it was announced officially.