Slapping palms as a form of greeting a friend and then holding their hand as you pull your fingers back until it makes a snapping sound.

From STEM, an abbreviation short for "Science, Technology, Engineering and Mathematics", a STEMlord is a pejorative term for a particular kind of person who has studied in these areas at university or works in these fields who holds a pretentious, condescending attitude to anyone who has studied in any other fields, particularly the Arts and Humanities. They typically believe themselves to be more "intelligent" and "rational", while generally remaining incredibly ignorant outside of their areas of expertise and having the charisma of a rotting pig's backside.

digital authentication protocol

a greeting mechanism that can consist of or combine multiple methods of hand based interaction (e.g. handshake/fistbump)

The knocking of fists together as a greeting, or form of respect

The knocking of fists together as a greeting, or form of respect.

If one person's ass is penetrated by two objects, it is generically called double anal penetration (sometimes abbreviated dp).

Double-Double: Multiple penetration by four penises. Two penises in the mouth and anus simultaneously.

Triple-Double: Multiple penetration by six penises. Two penises in the mouth, vagina, and anus simultaneously.