Idiom: Till the Cows come Home Posted on 26th October 201822nd November 2018 by DoubleClick Till the Cows come Home: For a long but indefinite time. Example: I could dance with you till the cows come home. Better still, I’ll dance with the cows and you come home. (Dialogue of the 1933 film Duck Soup) Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related Posted in Idiom and tagged Idiom T.