Meaning of “turn-off” - Learner’s Dictionary

turn-off

noun uk us /ˈtɜːnɒf/
PLACE [ C ]

a place where you can leave a main road to go onto another road

DISLIKE [ no plural ] informal

something that you dislike or that makes you feel less interested, especially sexually:

Greasy hair is a real turn-off.

(Definition of “turn-off” from the Cambridge Learner’s Dictionary © Cambridge University Press)