Excited smile, often child-like from saying and holding the word 'cheese'. A cheesy grin is any teeth showing smile meant to project person's most pleasing facial expression in what is typically a happy time. The word cheesy-grin describes the teeth showing smile most often associated with a young excited child being told to hold a 'cheese' sound to hold a smile while getting their first portrait taken.
I am excited or told to smile, so I flash a 'cheesy grin'. The Cheesy Grin smiley emoticon (emotional icon or symbol) is a distinct teeth showing smile. Also known as 'cheesy smile'.
by Cary Snyder December 29, 2007