We found one dictionary that defines the word be downhill all the way:

General (1 matching dictionary)

1. be downhill all the way: Oxford Learner's Dictionaries

▸ Words similar to be downhill all the way ▸ Usage examples for be downhill all the way ▸ Idioms related to be downhill all the way ▸ Wikipedia articles (New!) ▸ Words that often appear near be downhill all the way ▸ Rhymes of be downhill all the way ▸ Invented words related to be downhill all the way