'fop' originates from Dutch or Low German, specifically the word 'fop', where 'foppen' meant 'to deceive' or 'to mock'.

'fop' changed from Middle English 'foppe' (borrowed from Dutch/Low German) and eventually became the modern English word 'fop'.

Initially, it meant 'a fool or someone easily deceived', but over time it evolved into its current meaning of 'an excessively vain man concerned about his appearance'.