Most of my unusual "dinners" happen because I don't want to go get anything and don't have enough of anything to cook anything resembling an actually balanced meal. 

Kraft macaroni and cheese + roasted red potatoes: Sure it's all starch but hey, it was filling 

Cheese wiz + hot dogs: No ketchup, no buns, no problem!

Popcorn: I actually eat this for "dinner" more than I'd like to admit. It's only barely food but keeps me going until the next day when I go to the grocery store. Unless I forget, in which case I eat it  again. Current record 3 days in a row