We found 2 dictionaries that define the word to be on ones back:

General (2 matching dictionaries)

1. to be on one's back: Wordnik
2. To be on one's back: TheFreeDictionary.com

▸ Words similar to to be on ones back ▸ Usage examples for to be on ones back ▸ Idioms related to to be on ones back ▸ Wikipedia articles (New!) ▸ Words that often appear near to be on ones back ▸ Rhymes of to be on ones back ▸ Invented words related to to be on ones back