I have seen many many images where what I can only describe as "body steam" is hanging around in clouds, usually denoting body heat, but not the same as breath. However, there are as of yet no tags for this trend despite its ubiquitous presence in so many images. Here are some examples: post #1844501 post #3753518
I have found some which are tagged breath that share the same style of "clouds" of heat but this kind of 'steam' is not always because of the subject breathing, otherwise it is not tagged as such.