The term 'Clumsy Fellows' can be broken down into three crossword solutions: OAFS (4 letters), OXES (4 letters), and LOUTS (5 letters). OAFS is an acronym for 'Oddly Awkward Fatuous Slobs', which is a derogatory term for people who are clumsy or awkward. OXES is another term for buffoons, which are people who are foolish or silly. Lastly, LOUTS is a term for people who are boorish or rude. All three terms refer to people who are socially inept or clumsy in some way.