throw back UK /θɹəʊ ˈbæk/US /θɹoʊ ˈbæk/ verb4 •To drink quickly, especially alcoholic beverages.We threw back drinks until the next morning. •To retort.She jumped to her feet and began stalking away. “Going to cost me fifteen dollars to clean this outfit,” she threw back over her shoulder. — 2011 •To revert to an earlier stage of development.The Century A large proportion of the steerage passengers throw back to their Darwinian ancestry. •To hinder the development of something. formsthrew back · thrown back · throwing back · throws back