Heading to the office is never easy. Working long hours. sending emails. The Sisyphean task of getting back on task after your lunch break. But amid all the ails that come with clocking in, none are arguably as bad as a truly terrible colleague — just ask the fine folks of Reddit who found themselves stuck with the workforce's worst.

From dropping slurs to the existential horror of a clicking pen, here are 24 nightmare co-workers who will have you begging for a single cubicle.