Some kind of food (usually cakes) which look like they're just begging to get eaten
Jane: "LOOK AT THESE CAKES!"
Jim: "that ones got so much munch appeal i might just cream...."
When you see a Girl(or guy) and decide right there on the spot that you would eat them
Jeff:"Jenn is soo Jucie!"
Freddie:"Shes Got Munch Appeal!!"