Images depicting a character who is irritated, annoyed, or angry to the point of emitting vapor or gas. This is depicted by small clouds forcibly coming from the character, particularly the head (post #476339).
This tag is unlike smell, which lacks the movement. It is also unlike aura, which appears more as an energy that comes from the body as a whole. Lastly it is unlike head steam, which doesn't move as forcibly from the character, tends to gently waft upwards from the character, and is commonly touching the character.