Down in the dumps - Down and depressed. He's been down in the dumps lately. He just feels depressed and a bit despondent. Down in the mouth - Sad. She's down in the mouth. She’s really upset about the things that have happened lately. Down the tube - For something to go wrong, especially if something goes wrong with an exciting plan. We were so excited about our upcoming party plans, but everything ended up going down the tube. Down-to-earth - To be practical and have lots of common sense. One of the things I like most about Katie is how down-to-earth she is. She's always so sensible and I like going to her for advice. Down to the wire - The deadline for a project is quickly approaching. We're down to the wire on this project! We must devote all our energy to it until it is complete.