It's a group of three friends who always crash parties when only one of them is invited to it. When they hang out together they just play pool or N64, even if it's for hours at a time. They constantly refer to inside jokes in front of everyone and just laugh because they don't care. They sneak out to go to girl's houses, even if they stay they for only 10 minutes. Everyone knows a group of people like this because they brag about it all the time.

Music so good it could elicit sexual arousal.

While taking a daily sampling of your b.o., you decide to complete The Trifecta.

when two dudes are docking while on top of a chicks face, simultaneously giving her a roman helmet AND a cincinnati bowtie.(changes to a superfecta if the cinicnnati bowtie man gives her a hot karl)

When you burp, fart and shit your pants at the same time.

The rare time that you shit yourself, cum and throw up everywhere simultaneously. Not regularly seen but usually occurs because of a large orgasm that causes you to shit yourself and out of such disgust for yourself you start throwing up.

A group of three people that are the head of a friend group. These three people are usually the funniest of the group. A trifecta always has each others back, and the friend groups.