It means he's really angry.
It means being ticked off, or very mad.
The meaning of the idiom suck it up is to stand up or stand tall amidst all troubles. It can also be reversed as "compose yourself", "bear your troubles", and "go on".
It means easily angered, or not in control of your emotions.
It means stay with the rest of the group.
It made me laugh very much.
It means "shut up" or "be quiet"
to come up with new ideas
It means to gather up enough courage to do something.
Young blood is used to describe up-and-coming young people.
"To be" is not an idiom - it's a verb.
To be brave enough to do something challenging
The idiom your blood is boiling usually means that you are mad/furious.