We all think that nimrod is synonymous to morron, idiot and other lovely adjectives when actually- it means the absolute opposite, sort of.
Dating back to 1712, nimrod is an actual noun meaning a great hunter. The word came about as reference to the biblical son of Cush named Nimrod who was “a mighty hunter before the lord”. It was only in 1983 that this word became a teenage slang for someone who is somewhat inapt. Why? No one seems to know.