when something blows your mind, it gives you a mind boner.
friend:shit dude! did you hear that new luvtonez joint?
president barack obama: yeah man, shit is real. it gave me mind boners!
When you feel titillated looking at a HPOA
but not enough to show physical evidence for it (read: boner)
Man! I got a mind boner when I saw 'Jenny the HPOA girl'!
When you mind has a big boner but your penis does not.
Hey girl, I know my penis isn't hard but I've got a major mind boner.
When you have an intense discussion about a topic and you get a subsequent mind boner. The excitement and arousal of the mind from entering a heated debate that lends to the feeling of wanting more. Mind boners can also be used to mind fuck people in order to inseminate and propagate ideas. (See also mind fuck)
"Dude that talk last night about the unknown universe gave me the sickest mind boner."
"I totally mind fucked my roommate with my mind boner last night."
when you look at a girl and she is so hot that your get a mindboner without even getting a real boner
joshua eagle saw a hot girl and got a mindboner