PQG Share definition Flag Person of Questionable Gender. Used when you have absolutely no idea what gender someone is and no features or name will distinguish. Guy 1: Hey is that a guy or a girl over there?Guy 2: No idea. Must be a PQG. PQG by Pi 3.141592654 June 4, 2011 0 0 Get merch Get the PQG mug. Buy Now — $32.95 See more merch