Idiomatic Expressions Using the Word "Skin"

There are lots of expressions that use the word "skin" in them like, "to get under one's skin".  So when someone gets under your skin, it means that they really bother you and annoy you.  Other expressions include:-

SKIN DEEP 

So if something or someone is skin deep, it means that they are very shallow and/or fickle

Make Your Skin Crawl

If something, like a movie, makes your skin crawl then it terrifies you or disgusts you (depending on the movie)

SKINFLINT

You're not the most generous person in the world if you're called this.  You're miserly and would take the shirt off anyone's back just to make a profit

A GOOD SKIN

On the other hand, if you're called this, you can hold your head up high.  You're a good lad or lassy

BY THE SKIN OF ONE'S TEETH

It means a narrow escape.  Example - She just passed her exams by the skin of her teeth.  She barely scraped up a pass.

THICK SKIN

To have thick skin, means that nothing fazes you or makes you angry or upset

TO LEAP OUT OF ONE'S SKIN

This means that you get a sudden surprise or fright.