We found one dictionary that defines the word be as [fast etc.] as all get out:

Miscellaneous (1 matching dictionary)

1. be as [fast etc.] as all get out: Idioms

▸ Words similar to be as [fast etc.] as all get out ▸ Usage examples for be as [fast etc.] as all get out ▸ Idioms related to be as [fast etc.] as all get out ▸ Wikipedia articles (New!) ▸ Words that often appear near be as [fast etc.] as all get out ▸ Rhymes of be as [fast etc.] as all get out ▸ Invented words related to be as [fast etc.] as all get out