I think you heard it wrong. There is an idiom OPEN AND SHUT, which means something is over and done quickly, as if you opened the book, read the law, and shut the book quickly again.
It is the opposite of open-handed. It means ungenerous, stingy, unwilling to share. Used of those who have much - and don't seem to enjoy it , especially.
Means that you are open to accept new or different ideas. The opposite is narrow-minded
The expression is "wearing your heart on your sleeve" and refers to someone who is outwardly sensitive and emotive, open, honest, trusting--and often taken advantage of.
to open up a can of worms means to bring even more problems to be dealt with than there were before. The can of worms is a new set of issues.
It means to stop talking. The image is of you putting a lid over your open mouth like a pot lid.
it means it is close
What do you mean?
The phrase "it's on for young and old" is an idiomatic expression that means a situation is intense, exciting, or competitive, and it is open to people of all ages to participate in or witness. It implies that the activity or event is engaging for both the young and the old.
6(x + 7) = 6x + 42
It meens it is thirsty or it is hot
To blink means to open and close your eyes rapidly.
To close something securely means that you latch it tightly so it won't just pop open or slowly open over time, you have to unlatch it for it to open. Or to seal.