We found one dictionary that defines the word not have the faintest idea notion:

General (1 matching dictionary)

1. not have the faintest idea/notion: Merriam-Webster

▸ Words similar to not have the faintest idea notion ▸ Usage examples for not have the faintest idea notion ▸ Idioms related to not have the faintest idea notion ▸ Wikipedia articles (New!) ▸ Words that often appear near not have the faintest idea notion ▸ Rhymes of not have the faintest idea notion ▸ Invented words related to not have the faintest idea notion