What is another word for mouth-breather?
Pronunciation: [mˈa͡ʊθbɹˈiːðə] (IPA) 
"Mouth-breather" is a derogatory term used to describe someone who breathes through their mouth instead of their nose. There are several synonyms for this term that can be used to describe such an individual. For instance, a common synonym for mouth-breather is "mouth-breathing moron." Other synonyms include "respiratory simpleton," "air-sucking imbecile," "oxygen-deprived nincompoop," and "nasal-challenged nitwit." While these terms might be humorous, it is important to remember that using derogatory language is not kind or respectful to anyone. It is important to treat people with respect and kindness, even in the face of frustrating habits or behaviors.
