He tried to keep a straight face although he thought what she had done was very silly and stupid.
"They will try to make you mad, but keep your shirt on while I make the deal." "The waitress told the impatient customer to keep his shirt on, and that he would be served when it was his turn."
This is not an idiom - it means exactly what it says. You should stay fit and healthy.
That's not an idiom. Keeping a matter secret means not letting anyone know about it.
It is just an idiom and has no history.
Stay calm
keep your chin up!
The idiom "keep an eye out for" refers to watching for something or someone. An example of a sentence using the idiom would be: Jeff should be arriving soon, so keep an eye out for him.
"They will try to make you mad, but keep your shirt on while I make the deal." "The waitress told the impatient customer to keep his shirt on, and that he would be served when it was his turn."
The idiom "hard to keep a straight face" means struggling to maintain a serious or composed expression, especially when faced with something amusing, surprising, or absurd. It implies difficulty in controlling one's facial expressions to conceal emotions such as amusement, disbelief, or astonishment. This idiom is often used to describe situations where one finds it challenging to hide their true feelings or reactions.
Keep watch on.
You have to be agile to keep up with sentence requests on the Internet.
This is not an idiom - it means exactly what it says. You should stay fit and healthy.
Interia is the tendency of a moving object to keep a moving in a straight line
a sentence is.... I am just so absentminded, but I don't understand why i keep forgetting my things. thats a sentence using absentminded!
That's not an idiom. Keeping a matter secret means not letting anyone know about it.
It is just an idiom and has no history.
The wind was too strong, so I had to wind up my kite to keep it from blowing away.