turn-off

From the verb phrase turn off.

turn-off (plural turn-offs)

1. (idiomatic) Something that repulses, disgusts, or discourages, especially sexually.

   I like the people at my job, but the 60-hour work weeks are a big turn-off.

   Braces on a pretty girl actually aren't a turn-off for me.

   Synonym: passion killer

2. A road where one turns off, such as a motorway exit.

• turn-on

• turn off