concurr Share definition Flag It means to agree with something or someone. When I was in the Marine Corps, we always said this to one another. I had never heard it before, but now I use it all the time. Person#1: The sky is blue.You: I concurr. concurr by B weezy70 September 4, 2009 0 0 Get merch Get the concurr mug. Buy Now — $32.95 See more merch