Whenever you are high and you start to get a headache. Like fr blood rushes to a dick and it’s a boner, blood rushes to the head and it’s a headache. Same thing so headboner.
Guy 1:I smoked a joint and took a fat rip of some nic.
Guy 2: I bet you had a massive headboner afterwards.
Guy 1: Oh yeah I did.
Literally a bone that sticks out of your head. similiar to a unicorn horn. It is detachable and was very stylish in the 80's. They are starting to come back into style and prebubescent girls are searching their attics and thrift stores to get there own.
Past tense for when a female wears a shirt with words on it and proceeds to judge you for trying to read their shirt. Telling you to stop looking at their chest.
Dude, did you see her rack?
Of course I did, didn't you see me just get mary headoned?
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.