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
Celestina	the-le-STEE-nah (Spanish), se-le-STEE-nah (Latin American Spanish), che-le-STEE-nah (Italian)	Spanish, Italian
Vanamo	VAH-nah-mo	Finnish
Terrell	['terəl]
Katheryne	KATH-ə-rin, KATH-rin	English (Rare)
Jorun	-	Norwegian
Chandler	CHAND-lər	English