way down

be down

1. To feel sad, depressed, dejected, or generally unwell. Usually used with mitigators or intensifiers, such as "a bit," "really," "rather," "so," etc. I got some bad news this morning, so I'm a bit down at the moment. You didn't do that poorly on the exam, don't be so down!
2. slang To be ready, willing, eager, accepting, or in agreement (to do something). A: "We're going for pizza later. You want in?" B: "Yeah, I'm down." I'm down to play a quick game of soccer if you are.
See also: down
Farlex Dictionary of Idioms.

way down

mod. very depressed. Poor Clare is way down. I think she has something wrong with her.
See also: down, way
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • be down
  • work off
  • work some fat off
  • will come of
  • will come of (something)
  • be sick
  • get (one) down
  • get down
  • feel down
  • (Is) life getting you down?
References in periodicals archive
Chris Lloyd, of Ogwen rescue team, said: "The lad took a real battering on the 80ft fall, striking a number of ledges on his way down. He was lucky he was held by this ledge though because he could have fallen a lot further.
WALES: TEEN 'S 80FT PLUNGE; Seventeen-year-old in intensive care after horror fall from peak
Actually, it's a very long way down the road, making the youths nervous if still grateful.
Wolf Creek
People will see how he treats people, and it will work its way down to the head coach and the coaching staff, all the way down to the equipment guy.
A Lott to cheer about