Draw On and In The Soup.

Today's phrasal verb is Draw On.  This is a rather complex phrasal verb that that has three meanings, each of which I will my best to explain.

The first meaning is for time to pass, usually slowly

As the lesson drew on, the students started to get bored.

A secondary meaning to this is for time to unfold or, in some cases, to approach.


As evening draws on.

The second meaning is to extract something from a resource

He draws on his knowledge of Japanese history in this novel. 
He drew on his faith to get him through that difficult time.

Draw on , in this case, is very similar to Draw from, of which I will provide an example.

She draws strength from her friends

The third meaning is
To inhale smoke from a cigarette, cigar, etc

He drew on his cigarette and coughed.


Notes:
 Intransitive- Inseparable.  Draw From, however, is Separable. The word "draw"  is a very complex verb/noun and I highly recommend looking at it further: http://www.thefreedictionary.com/draw+on.  Keep in mind that the word essentially means to pull, with the exception of its usage in the case a creating an image using an pen or pencil.

Today's idiom is In The Soup, which means

In a bad situation. (*Typically: be ~; get [into] ~.)

Experiencing a difficult situation  

As soon as the airlines started to make a profit, they put themselves right back in the soup with a new round of mergers.

Now I'm really in the soup. I broke Mrs. Franklin's window.  

I make a lot of mistakes. It's easy for me to get into the soup.

Usage notes: often used with right back, as in the first example. A variation of In The Soup is In The Stew, although I would say that In The Soup is more common. Also, it should be noted that a slang term used by sailors for the ocean is "soup".