KLUTZ Meaning of KLUTZ in English /kluts/ , n. Slang.1. a clumsy, awkward person. 2. a stupid or foolish person; blockhead. [ 1965-70, Amer.; klots lit., wooden beam kloc (G Klotz ) ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012