The Collaborative International Dictionary of English v.0.48:

Cheesy \Chees"y\, a.
   Having the nature, qualities, taste, form, consistency, or
   appearance of cheese.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cheesy
    adj 1: of very poor quality; flimsy [syn: bum, cheap,
           cheesy, chintzy, crummy, punk, sleazy, tinny]