On one’s mind
Currently being thought about.The incident at school was on my mind all week.
On one’s honor
With honesty and sincerity.I am on my honor when I look after the money for our club.
On the high horse
Acting as if one is better than others, very proud and scornful. The boy is always on his high horse and never thinks about other people.
On one`s (own) head
To be one`s own responsibility.The boy brought the anger on his own head and should not try and blame someone else.
On one’s guard
To be cautious or watchful.I was on my guard when I went into the meeting with my boss.
On one’s feet
Standing up.We were on our feet when the singer walked onto the stage.
On one’s feet
Recovering from sickness or trouble.I was sick for two weeks but now I am on my feet again.
On one’s coat-tails
As a result of someone else doing something.The mayor was elected on the coat-tails of his brother who is a famous actor.
On one’s chest
Thoughts or feelings that are worrying you and that you might need to share with someone else.I had a long talk with my friend last night... Read more →
On one’s best behavior
Being as polite as possible.The little boy was on his best behavior when he went to meet with his teacher.