We found 4 dictionaries that define the word fast friends:

General (3 matching dictionaries)

1. fast friends: Wiktionary
2. Fast Friends (TV series): Wikipedia, the Free Encyclopedia
3. fast friends: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

4. fast friends: Idioms

▸ Words similar to fast friends ▸ Usage examples for fast friends ▸ Idioms related to fast friends ▸ Wikipedia articles (New!) ▸ Words that often appear near fast friends ▸ Rhymes of fast friends ▸ Invented words related to fast friends