OB-GYN Share definition Flag A medical doctor who specializes in female plumbing, aka the reproductive system. From "obstetrician-gynecologist." I was an amateur OB-GYN before my arrest. I liked sticking my nose into women's snatches. OB-GYN by Cornholio November 4, 2003 0 0 Get merch Get the OB-GYN mug. Buy Now — $32.95 See more merch