Thaasophobia – Fear of being bored or having to perform boring tasks
This Redditor’s fear can be classified as thaasophobia as it falls under the category of performing monotonous tasks that feels like idleness. His fear was fueled by a dream in which he was asked to sweep a long array of stairs. This phobia is classified under thaasophobia as it resonates with being idle or boring. Sweeping an infinite number of steps is certainly a boring job.
This phobia can also be characterized as a form of koinophobia, irrational fear of living a boring life or doing boring tasks. However, if he gets paid to sweep the stairs, he would be fine with it.