ugly customer

Meanings:

1.
UKIrelandAustraliainformalcolloquial
- A person who is unpleasant, dangerous, or difficult to deal with.
2.
UKIrelandAustraliainformalcolloquial
- A situation, problem, or task that is particularly troublesome, awkward, or hard to handle.

EN: Better keep you doors and windows locked,he is an ugly customer
ES: No lo pudo ver de cerca, pero la descripción era bastante aproximada.
EN: And that ugly customer was the last Indonesian rhino on earth.
ES: Y ese cliente feo era el último rinoceronte indonesio de la tierra.
EN: Well, the Grim Reaper's an ugly customer, I'll... grant you that, but you know who's worse?
ES: La muerte es fea, eso no lo niego, pero ¿sabéis qué es peor?
EN: There's always an ugly customer wherever you go.
ES: Siempre hay un cliente desagradable donde quiera que vas...