Aww Yeeah! Share definition Flag Random exclamation of approval. For best results, use after other pieces of slang, or after a wordyour mom/word type insult. Your Friend: "Boo yah grandmother!" You: "Aww yeeah!" Aww Yeeah! by Vampiro September 4, 2003 0 0 Get merch Get the Aww Yeeah! mug. Buy Now — $32.95 See more merch