get one's dander up
get one's Irish up
get one's back up
To become or make angry or stubborn.
The boy got his dander up because he couldn't go to the store.
The children get the teacher's dander up when they make a lot of noise.
Fred got his back up when I said he was wrong.
Our criticisms of his actions just got his back up.
give the shirt off one's back
To give away something or everything that you own.
He'd give you the shirt off his back.
go back on one's word
To renege; break a promise.
Patrick went back on his word when he refused to marry Karen in spite of his earlier promise.
go back on
To turn against; not be faithful or loyal to.
Many of the man's friends went back on him when he was sent to prison.
The boy's father told him not to go back on his promise.
To fail to do necessary work; not work.
Grandfather's eyes are going back on him.
hang back
hang off
hang behind
To stay some distance behind or away, be unwilling to move forward.
Mary offered the little girl candy, but she was shy and hung back.
To hesitate or be unwilling to do something.
Lou wanted Fred to join the club, but Fred hung off.
hark back
To recall or turn back to an earlier time or happening.
Judy is always harking back to the good times she had at camp.
To go back to something as a beginning or origin.
The cars of today hark back to the first automobiles made about 1900.
The slit in the back of a man's coal harks back to the days when men rode horseback.
have one's back
To protect someone from harm.
At the time of your decision, your sister reached out to me to have my back emotionally, it wasn’t a romantic thing.
We understand that you have all of your staff backs.
have one's head screwed on backwards
To lack common sense; behave in strange and irrational ways.
Henry seems to have his head screwed on backwards; he thinks the best time to get a suntan is when it is raining and to sleep with his shoes on.