An acronym frequent in the parlance of those in the greater Philadelphia region to represent 'can't make this shit up'. In typical discourse, one interlocutor concludes a story of an interaction with someone of absurdly illogical yet stubbornly self-justified behavior by whispering on an exhale 'cmtsu...'. In standard call and response fashion, his fellow interlocutor will respond in sympathetic affirmation 'cmtsu...'.
Speaker: 'And that was it man, she told me it was fine for her to keep packing dingers but that when I did it it was just a sad effort to pretend I was back with the boys...cmtsu'
Friend: 'cmtsu...'
Friend: 'cmtsu...'
by Dusty Fantana July 17, 2020