Artemis Fowl the Last Guardian

get on in years | Someone who is getting on in years is growing old.
My grandmother is getting on in years. She's no longer able to look after her home without help. | knee-high to a grasshopper | This term refers to a very young and therefore small child.
Look how tall you are! Last time I saw you, you were knee-high to a grasshopper! | long in the tooth | A person who is long in the tooth is a bit too old to do something.
She's a bit long in the tooth for a cabaret dancer, isn't she? | mutton dressed as lamb | This expression refers to a middle-aged woman who tries to look younger by dressing in clothes designed for younger people.
The style doesn't suit her - it has a mutton-dressed-as-lamb effect on her! | no spring chicken | To say that someone is no spring chicken means that they are quite old or well past their youth.
How old is the owner? I don't know but she's no spring chicken! | over the hill | If a person is over the hill, they have reached an age when they can no longer perform as well as before.
Gran! You say you're over the hill, but you're a super cook! | rob the cradle | If you rob the cradle, you have a romantic relationship with someone who is much younger than yourself.
My uncle Ted is dating a twenty-year-old girl. That's really robbing the cradle! | silver surfer | A silver surfer is an elderly person who uses the internet.
After just a few questions my grandmother was ready to join the silver surfers. | put years on | If an event or difficult situation puts years on someone, it makes them look or feel much older.
I hardly recognized Mr.Brown. His illness has put years on him. | cut a dash | If a person cuts a dash, they make a striking impression by their appearance and attractive clothes.
Wearing his uniform, my grandfather cut a dash on his wedding day. | deck out | If you deck out someone or something, you dress or decorate them in a special way.
Paul decked out his car for the occasion. | dressed to kill | When someone,