What is the origin of the idiom "say it, do not spray it" and when to use it?

The idiom "say it, do not spray it" is a humorous and informal idiom, and it does not have a widely documented origin. It is primarily used to gently remind someone to speak clearly and without inadvertently releasing saliva during conversation, often in a playful or teasing manner. This idiom emphasizes the importance of enunciating words properly to avoid any discomfort or distractions caused by excessive spitting while speaking.