The Australian act of excrementing in ones pants (or underwear) in a McDonald’s Restaurant
Originated as a result of the legendary ‘Engadine Maccas’ incident in 1997- An event that shocked the Nation of Australia, It is now a popular term added to the vocabulary of Australian English and used in most common media.
“Prime Minister Scott Morrison committed the act of McSoiling in an Engadine Maccas in 1997”