'flog' originates from the 18th-century English slang, possibly a variant of 'flagellate,' which comes from the Latin word 'flagellare,' meaning 'to whip.'

'flog' changed from the earlier English word 'flagellate' and eventually became the modern English word 'flog.'

Initially, it meant 'to whip or scourge,' and this meaning has largely remained the same in modern usage.