Relationoupie Share definition Flag A person inbetween a relationship and a groupie. A hook up inbetween a singer and a normal person. My sister is a relationoupie; she hooks up with the lead singer from LMFAO from time to time and talks to him daily. Relationoupie by Jenneily October 29, 2009 0 0 Get merch Get the Relationoupie mug. Buy Now — $32.95 See more merch