A natural occurring high from starting at boobs for too long, big and small boobs. Some symptoms include: red eyes, sweaty hand syndrome, adrenaline rush from the heart rate going from 70 to 180bpm.
(Hanging out in the plaza mall)
"Hey man check out that massive rack on that girl"
"Ooohhh mmyyy, I think I'm having a boob high"
Noun: Two/ or more chicks, jumping in the air excitedly and performing a high five with their chests.
Note - They must incorporate loud obnoxious cheerleader hoorays as they complete this action.
Kyle: "Omg dude, those chicks totally did a high-boob!"
John: "Man...them chicks are fine!"
(Stella and Lily win a tennis match together)
Stella: I can't believe we won!
Lily: Me neither! High-Boob!
When Corbyn is going for the high-five but lacks the execution and bumps you in the boob instead.
(An extremely awkward high-five, created by Jeremy Corbyn on national TV)
Jezza gave her the high-boob, perhaps the most awkward encounter I've ever seen.