Mukki move

A Mukki move is considered an act of disregard to other people's time management. It often leaves a person (sometimes even plural) waiting and messes up plans.
In other ways it also leaves people to confusion as it describes the action of not responding to ones texts or leaving someone on read for a long period of time.

Boah, was ein Mukki move, ey!
Richtiger Mukki move!