The phrase "one corner short of a pentagon" is a North American idiom used to describe someone perceived as lacking intelligence or common sense. It fits within a broader category of expressions that highlight deficiencies in mental acuity, such as "one card short of a full deck" and "one sandwich short of a picnic." The discussion also touches on the humorous nature of these sayings, with participants creating variations like "one electron short of a full shell" and "one lambda short of a fundamental frequency." Overall, the term conveys a sense of being out of touch or overly conventional.
PREREQUISITESLanguage enthusiasts, educators, and anyone interested in the nuances of idiomatic expressions and humor in English communication.