The act (or, indeed, thought) of giving a person a high five
without any physical contact, as the two persons are usually across the room from each other and far too lazy to get off their asses. Often occurs after a minor success or simply to display ones awesomeness. The process will many times include nodding to further affirm their collective staggering amazingness.
Person No. 1: Hypothetical high five!
(Persons 1 and 2 think about this)
Persons No. 1 & 2: Nice!