Say cheese Definition 1 of 2Pro Tip 1/3Photography Cue Used by photographers to get a uniform smiling expression from subjects in a picture. Everyone, look here and say cheese! Pro Tip 2/3Group Photos Commonly used during group photographs to prompt simultaneous smiles. At the family reunion, the photographer had us say cheese all at once. Pro Tip 3/3Cheerful Tone Saying 'cheese' naturally extends the corners of the mouth, creating a cheerful look. She asked her friends to say cheese for a more inviting photo.