Bumblers are people who are clumsy, awkward, and generally inept. NIMRODS is a seven-letter term for bumblers, referring to someone who is foolish or silly. KLUTZES is another seven-letter term for bumblers, referring to someone who is clumsy or awkward. OAFS is a four-letter term for bumblers, referring to someone who is clumsy or stupid. Finally, SADSACKS is an eight-letter term for bumblers, referring to someone who is a loser or a failure. All of these terms refer to people who are not particularly skilled or competent in their actions.