English

ratbag

From rat + bag.

A compound of rat + bag

Proto-Germanic *rattaz

Proto-West Germanic *ratt

Old English ræt

Middle English raat

English rat

Old Norse baggi ‘bag, pack, satchel, bundle’

Middle English bagge ‘a fabric container’

English bag

Today it means

noun A despicable person.

Language periods are conventional ranges, not dates for this word.