Being sexually aroused by eavesdropping on people, often people having sex or using the toilet.

It's like voyeurism for the ears.
"Ew! I just saw a guy in the female toilets with a microphone masturbating!"
"Sounds like an ecouteurist!"

"I feel so guilty. I overheard my neighbours having sex and it out me in the mood and I got off on it!"
"Well, sounds like you've discovered you're into ecouteurism!"
by dapperchapper July 21, 2017