We found 4 dictionaries that define the word go down the plughole:

General (3 matching dictionaries)

1. go down the plughole: Oxford Learner's Dictionaries
2. go down the plughole: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

3. go down the plughole: Idioms

▸ Words similar to go down the plughole ▸ Usage examples for go down the plughole ▸ Idioms related to go down the plughole ▸ Wikipedia articles (New!) ▸ Words that often appear near go down the plughole ▸ Rhymes of go down the plughole ▸ Invented words related to go down the plughole