yummo adjective 1exclamation 1 adjective1 •(informal) Yummy; delicious.Lunch was yummo today. Sammy gave us hot soup with little noodles, and roast lamb with big crunchy potatoes — I had three. — 1999 exclamation1 •(informal) Yum; yummy."Yummo! A maiden! Can I have a bit?" it asked Knight. "Certainly not," said Knight grumpily. "It's mine!" — 2001
