The intense intellectual excitement or stimulation one feels when encountering a brilliant idea, profound theory, or mind-blowing concept. It’s like your brain just got an adrenaline rush.
When a man has a hypothetical boner for another man. i.e. mancrush. This does not mean that the man is actually sexually attracted to men, just that if he were attracted to one, a certain man would be it.
Dude: I'm can't chill, I'm going to the gym with Alex.
Chick: I figured, you've got a total manboner for him.
Dude: Shut up.
Taken from the 2011 summer series "Friends With Benefits," a Mindbanger is the one significant other who gets into your head and takes over your mind in a way that all you care about is becoming like them and sustaining a clearly dysfunctional relationship. All you want to do is become whoever you think your boyfriend wants you to be, while losing yourself in the process.
A person who is mindbanged becomes completely disconnected with their family, friends, and previous lifestyle in pursuit of a pointless relationship.
"Oh...there goes Sarah, falling for her mindbanger, Joe"
"Yeah isn't he the guy who totally devastated her after she moved cross country for him instead of taking that big promotion?"