일을 엉망으로 만들거나 서투르게 처리하는 사람 또는 물건.
A person who creates a mess, acts in a disorganized or clumsy way, or wastes time by messing around.
예문:
"The new intern is a bit of a messer, but he is willing to learn."
"Stop being a messer and focus on getting the project finished."
"I don't want any messers involved in this delicate operation."