wallahoo Share definition Flag when someone subtly flirts with a person who already has a partner, especially in a way that makes the partner look bad or irrelevant. Bro, sam kept wallahooing during the whole party while puddings boyfriend was right there wallahoo by samearl sandydoods March 16, 2026 0 0 Get merch Get the wallahoo mug. Buy Now — $32.95 See more merch