Idioms (parts of the body)

There are a lot of English idioms based on parts of the body. Here are some examples :

It cost an arm and a leg  
It was very expensive
 
They don’t see eye to eye  

They don’t agree with each other

She’s got a nose for a bargain  
She’s very good at finding ......
 
I was on my knees by the end of the day  
I was very tired 

There's no elbow-room 

There isn't enough space

We did it by the skin of our teeth

We only just succeeded, we almost failed

He doesn’t have a leg to stand on  

There’s no justification for what he did or says

 
I really put my foot in it 
I said something by mistake that I shouldn’t have said

She gave him the cold shoulder 

She rejected him; she ignored him

 
He’s pulling your leg  
He’s pretending something is true when it isn’t, as a joke

The car is on its last legs 
It’s old and will soon be unusable
 
He welcomed us with open arms 
He was very pleased to accept our help

We soon lost heart 
We became demotivated