ERQ Share definition Flag The 'threesome' of Emerald, Ruby, and Quartz. It was founded in Northwest High School. You wish you were in it. E: When is the next ERQ night? Q: This Friday, like every Friday. R: We will make babies. ERQ by Ruby March 17, 2005 0 0 Get merch Get the ERQ mug. Buy Now — $32.95 See more merch