Knuckle draggers is a derogatory term used to describe people who are considered to be unintelligent or uneducated. The term is derived from the idea that these people walk with their knuckles dragging on the ground, similar to APES. This term is often used to describe people who are not well-informed or lack common sense. The crossword solutions for the term knuckle draggers are APES, which is a fitting description of the people this term is used to describe.