lamb taco Share definition Flag Slang for Gyro, a Greek dish made with roasted lamb, onion, and tomato served in a pita. "Hey Riley, what you going to have for lunch today?" "I think I'm going to go to Niko's and get lamb taco!" lamb taco by Kimos December 28, 2005 0 0 Get merch Get the lamb taco mug. Buy Now — $32.95 See more merch