| Idiom | Meaning | Example | 
| window of opportunity | 
(See a window of opportunity)
 | 
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| window on the world | 
the place where you can  see the world
 | 
For some people, TV is their only window on the world.
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| wing it | 
improvise, change your plans, play it by ear
 | 
If I am asked strange questions at an interview, I wing it. I give  the best answers I can think of.
 | 
| wingding | 
wild party, bash
 | 
We went to Happy Harry's wingding. It was a great party.
 | 
| wingnut | 
a person who acts crazy, a nut
 | 
Jerry, you wingnut! How did you get that horse in the elevator?
 | 
| wingy | 
wild, crazy, wacko
 | 
Leon drove his car into the lake again. That guy is really wingy!
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| winner take all | 
the winner of the game gets all the money
 | 
Bert said, "Let's play one more game of poker, winner take all."
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| winning isn't everything; it's the only thing | 
winning is the only thing that matters, get it straight
 | 
It was Vince Lombardi, a football coach, who said, "Winning isn't everything - it's the only thing."
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| winning streak | 
winning game after game, make a clean sweep
 | 
The Expos have won nine games - their longest winning streak.
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| wino | 
an alcoholic, a drunk, in the tank
 | 
See that wino over there. He used to be the president of GASCO.
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