say cheese
idiomPart ofcheese
say cheese — idiom
1. An instruction given just before a photograph is taken, prompting people to smil
1.idiom
Definition
An instruction given just before a photograph is taken, prompting people to smile by shaping their mouth as if saying the word 'cheese'.
Example
The photographer told the wedding guests, 'Everyone say cheese!' and snapped the picture.
Before taking the class photo the teacher said, 'OK children, say cheese!'