Idiom: Speak of the devil Posted on 7th September 20187th September 2018 by DoubleClick Speak of the devil: appears unexpectedly while being talked about Example: Did you hear what happened to Tom recently. Speak of the devil, here he comes. 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 S.