ugly customer

An ill-natured or vicious individual, as in Watch out for Charlie when he's drinking; he can be an ugly customer. This phrase uses ugly in the sense of "mean" or "dangerous." [c. 1800]

Common Names:

Name	Pronounced	Usage
Adriano	ahd-RYAH-no (Italian)	Italian, Portuguese
Prissy	PRIS-ee	English
Pattie	PAT-ee	English
Hayden	['heidən]
Stijn	STIEN	Dutch
Olanrewaju	-	Western African, Yoruba