The phrase ‘fretty’s mum’ derives from the Latin word ‘fretilo mater’ - it’s commonly used during a game of knock-a-door run. It is used in a sentence in two ways, one, for example would look like this “who’s house we knocking on, what about ... fretty’s mum”. Another, looking like “that is frettys mum vibes that” when experiencing a bad dinner.
by Booland March 15, 2019