seb pitzu deal

when 2 people make a deal that they are going to do something but both of them know that it is unlikely that they'll do it/ it actually happens but they talk like they will for sure do it/ it will for sure happen

person 1: there is a party tomorrow wanna come.
person 2: cant I need to be in Berlin the day after tomorrow at 10 am.
person1: just take a plane to berlin when the party is dead at like 3 am
person 2: your right let's do it!
person 3: now that a seb pitzu deal if I ever heard one smh
person 1 and 2: Nah fuck you man
the next day person 2 says he can't make it and person 1 goes to the party alone.