A Leopard Can't Change His Spots

 I think it means someone can't change something no more.

Brownie Points

 I think it means that someone pointed to the brownie.

Chip on his Shoulder

 I think it means that something on your  shoulder.

Dirt Poor

 I think it means you are poor.

Eat Drink and Be Merry

I think it means that first you have to drink then get merried. 

Funny Farm

 I think it means that a farm is funny.

Go The Extra Mile

 I think it means to go another mile.

Hit the Hay

I think it means go away. 

I'll Have His Head On A Platter

I think it means that some one is going to beat you up. 

Joshing Me

I think it means to stop bothering me. 

Knock on wood

 I think it means to hear the wood.

Like a chicken with its head cut off

 I  think it means to see a chicken head come off.

My Brother's Keeper

 I think it means that your brother keeps some stuff.

No Room to Swing a Cat

 I think it means we can't afford a pet.

Over the Top

 I think it means tio be on the top.

Put on your thinking cap

 I think it means to think with your brain.

Quality Time

Rain Cats and Dogs

 I think it means that it is raining hard.

Skin of your teeth

Til the cows come home

Under the Weather

 I think it means that it is cold.

Van Gogh's ear for music

Who Let The Cat Out Of The Bag 

X marks the spot

 I think it means someone found something.

You are what you eat

I think it means you are meat.

Zero Tolerance