Not to be confused with Brunch which is a more direct joining of breakfast and lunch.
"Lunchfest" is when you wake and bake and then are too lazy to make or go get breakfast, so you wait till like1 or so, till the hunger builds and then you pig out stoner style.
A drinking holiday; held on Thanksgiving,Christmas and New Year's Eve. You eat junkfood,watch movies,drink massive amounts of alcohol and end the evening shit-faced and listening to loud rock music.
A meal taking the place of both breakfast and lunch. Unlike "brunch" which is usually a hearty, planned affair in a restaurant, lunkfest usually consists of fast food or whatever food is lying around the house, and is usually the result of sleeping in to the point where eating a separate breakfast and lunch would be impractical.
Guy: I overslept.
Other guy: That sucks, you missed breakfast.
Guy: Who cares? I can still eat lunkfest.