It means to gather up enough courage to do something.
To be brave enough to do something challenging
nerve from a can, nerve from a bottle: to gain a false sense of courage by drinking alcohol
"Take heart" means to be courageous or hopeful, to think positively
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 stay with the rest of the group.
It means "shut up" or "be quiet"
It means he's really angry.
to come up with new ideas
It made me laugh very much.
No, "fearless" is not an idiom. It is an adjective that means lacking fear or showing courage.
"To be" is not an idiom - it's a verb.
The best way to find out the meaning of an idiom is to look it up in a reputable dictionary or idiom database. You can also search online for the idiom along with the word “meaning” to find explanations and examples of its usage. Additionally, asking a native speaker or language teacher for clarification can help you understand the idiom better.