Are You in Meaning?

Are you in or (are you) out?: Do you want to participate or not? Do you want to take part or not?

Are you in there meaning?

-Are you in there? (-No, I'm not.): -Are you there? Are you inside (that room, cupboard)? (-No, I'm not.) idiom.

Are you in for it meaning?

used for saying that you are going to be in trouble because of something that you have done. 'Now we're in for it,' Phillip said as they trooped into the headmaster's room.