Metabros

When you have a platonic "bro" like relationship with your metamour.

Metabro 1: I fucked your girlfriend last night.
Metabro 2: Well I fucked YOUR girlfriend last night.
Metabros in unison: We have the same girlfriend!

*High fives ensues*

Rainbow shit

An unbelievable occurrence, similar to oh shit or oh snap.

You got to be Rainbow shitting me?!?