cheesy(s = adj.all) bum, cheap, chintzy, crummy, punk, sleazy, tinny - of very poor quality; flimsy;

   Having the nature, qualities, taste, form, consistency, or appearance of cheese. [1913 Webster]

cheesy, adj. (cheesier, cheesiest)
1 like cheese in taste, smell, appearance, etc.
2 sl. inferior; cheap and nasty.

Derivative:
cheesiness n.