bête noire
Concise Oxford English Dictionary © 2008 Oxford University Press:
bête noire /beɪt ˈnwɑː, bɛt/
▶noun (pl. bêtes noires pronunc. same) (one's bête noire) a person or thing that one particularly dislikes.
– origin Fr., lit. ‘black beast’.
'bête noire' also found in these Oxford entries:

