gualtrapa
(n./adj.) A person who is messy, scruffy, or does work in a sloppy, careless way: a slob or a botcher. (adj.) Low-quality, shabby, or dirty. (In Spain, this is a common colloquialism for someone who is unkempt or incompetent).
You have to be a real gualtrapa to show up to a wedding in ripped jeans. That plumber is a gualtrapa, he flooded the whole house.
Automatically translated from Spanish