to make something stronger ,,
It means things are trustworthy.
To make a mistake
About to be sold, or given up.
say no to it
It means shut up!
flatter her to get something
To keep struggling and not give up.
he suddenly turned up (to appear, emarge)
It's not an idiom. To break camp means to break it up, to pack your things and leave the area. It can be used as slang, however, to mean a group "packing up" and leaving.
The idiom "crack someone up" means to make someone laugh or amuse them greatly.
The idiom buck up means to cheer up. For example one might say "she began to buck up once I showed her some photographs of her children when they were younger."
It means to concede defeat and stop trying.