Someone who finds intelligence the most sexually attractive feature.
Aka, a fucking liar.

sapiosexual One for whom the brain really is the primary sexual organ.

A term that is the last hope for lonely losers, overweight women, and pretentious tools of both genders to make themselves feel better by purportedly valuing "intelligence" over physical appearance. Frequently used in online dating profiles to give the appearance of depth and to, self-reverentially, designate oneself as very intelligent.

Somebody that is sexually attired by someone that is intelligent regardless of their beauty. That is they are more attracted to someone intelligent than someone else less intelligent without regarding beauty. If that someone is ugly as hell but intelligent doesn't automatically means there is an attraction. There must be more. Like completion in fields of intelligence, some beauty of course if you play in your league. Some appreciation of the other intelligence. The beauty is another less higher in importance in your choosing of a mate to perform with.

The way nerds believe sex is.
sapiens=smart

I want to fuck or fall in love with intelligent people. Watching someone workout differential equations makes me horny. Having brilliant professors in college makes it extremely rough to keep to myself because OMG I want to fuck my professors!

The official sexuality of 'Chivalrous Gentlemen' (see neckbeard and nice guy syndrome), meaning an attraction to individuals (almost always of the opposite sex, and almost always conventionally attractive) with high intelligence (prime signifiers are interests in: Doctor Who, MLP, fedoras, and Japanese entertainment, etc. and rarely practical measures such as IQ, college education, or independence). Sapiosexuals take unhealthy interest in sexualizing children's cartoons, stalking women, and MRA Activism. Due to their luck, or lack thereof, in courting, they frequently blame society for sexual inactivity.