A phrase often quoted by Food Network Star Rachael Ray to describe something that tastes or looks delicious.
Just look at those seared scallops. Yum-O!
by Noah J December 27, 2006
yummy, delicious, etcetera, An expression of joy in the food/pastry one person is eating.
I want a hoho,and cake, and food!!!yumo!
by billygoat99 March 10, 2007