Something that causes you excitement in a sexual way. Turn off can be the opposite, or something that makes you not want someone sexually.
It was a total turn on/off to watch him take off his shirt in the hot sun while he was installing some gutter guards.

He has bad breath. That's an instant turn off.
by vtown November 26, 2013
Get the turn on/off mug.
Advanced advice on solving problems with computers.
Have you tried turning it off, then on again?
by Anonymous April 1, 2003
Get the Turn it off, then on again mug.
Basically something that disgusts you, find embarrassing or unappealing (mostly) about the opposite sex.
1. Lisa: "So, my boyfriend and I had sex for the first time last night."

Natalie: "Really!? Oh my god, how was it?"

Lisa: "It was okay... but when he started climaxing, he farted! It smelled so bad!"

Natalie: "Ew!! What a turn off!"

2. "There was this random girl who danced with me at the party last night. She was so hot. But when she grinned at me at me, I noticed she was missing two front teeth. Immediately turned me off, man."
by HaltDenMund December 20, 2010
Get the Turn off mug.
When something makes you lose all excitment from being turned on
"I have to take a shit before sex " pony said , that turned off
by Felcia120 February 25, 2015
Get the turned off mug.
Things that will make what seems like a really good time in bed, into something unpleasant and embarassing.
"My ex does a much better blowjob than you"

"Is your mother/daughter dating"

"How much do you weigh anyway?"

"Can we get this on"

etc, etc
by Indeedlydoo August 11, 2005
Get the Turn off mug.
when u r really horny and suddenly u see something that takes the feeling away.
like if u see a girl and she starts giveing u a bj and ur like fuk yea this is so hot and ur excited and "turned on" and then she takes off her pants and has a dick and then takes off her/his wig and is a man then ur like wtf, want to go puke, want to kill it, and are "turn off"
by Jamal Smokepot November 8, 2010
Get the turn off mug.