In a gaming scene the word cheese is used to describe strategies or ways of playing that are really powerful and do not require much skill from the players side at the same time. The term is widely used both in video games and tabletop games alike.
It is extremely subjective, there's no strict definition of what is "cheese" and what is not, but that's besides the point.
What are the origins of it? What has cheese to do with "undeserved" victories, cheap strategies, etc.?