Out of the loop
Not included
Hanging by a thread
to be in a bad situation/almost failing/barely holding on
On the same page
thinking similarly/understanding each other
All eyes and ears
Listening very closely
Joined at the hip
very close to someone
Hit the books
begin to study
Cool as a cucumber
calm even in a difficult situation
Get the picture
to understand
When pigs fly
something you think will never happen
Pull someone's leg
to joke with someone
