Phrase(s): Brevity is the soul of wit.
Prov. Jokes and humorous stories are funnier if they are short. • Dale took ten minutes to tell that joke; he obviously doesn’t know that brevity is the soul of wit. • The comedian was in the middle of a long, tedious story when someone in the audience shouted, "Brevity is the soul of wit!"
McGrawhill's American Idioms And Phrasal Verbs