When one uses their hand in a tapping motion on a womans fanny area.
Usually when you tap, you say 'Fanny Tap' in a high pitched voice.
Fanny tap is in no way sexual, but just a fun way of getting on someones nerves.
A gentle tap on the body of another, as a sign of praise or affection. Whilst it's usually done with a fist, it's not meant to cause any pain.
Think of it as a "fist bump" but instead of two people complimenting each other, it's "one-sided". So instead of two fists meeting, it's from one person's fist onto the body of another person, usually the shoulder, chest, or another part of the torso.
I've never seen her love tap anyone after a game. I think she likes you"
The one prevailing law during a gangbang that creates order from disorder. After a reasonable period of time has passed, the gentleman who's "on deck" may tap the shoulder of the gentleman currently "at bat," and the latter gentleman must step aside and let the next guy have his turn.
This rule also works for drinking at a water fountain.
The Tap Rule was popularized during one particular scene (I believe it was No Holes Barred 4) where a certain anonymous man repeatedly ignored the aforementioned shoulder tap and was sternly reminded by one the men standing by to, "Respect the Tap Rule."
Rather than let the normally enjoyable experience turn to violent anarchy, the man relented and allowed the next gentleman to put his hoohoodilly in the female participant's cha-cha or whoopsidaisy, thereby preventing possible bloodshed.