We found 5 dictionaries that define the word down the tube:

General (3 matching dictionaries)

1. down the tube: Merriam-Webster
2. down the tube: Wiktionary
3. down the tube: Dictionary.com

Medicine (1 matching dictionary)

4. down the tube: Merriam-Webster Medical Dictionary

Miscellaneous (1 matching dictionary)

5. down the tube: Idioms

Phrases: go down the tube, goes down the tube, going down the tube, gone down the tube, went down the tube, more... ▸ Words similar to down the tube ▸ Usage examples for down the tube ▸ Idioms related to down the tube ▸ Wikipedia articles (New!) ▸ Words that often appear near down the tube ▸ Rhymes of down the tube ▸ Invented words related to down the tube