Deep inhalation if breath, immediately after waking up, or recovering from sleeping. (Opposite of yawn, a deep inhalation of breath indicating the need to go to sleep, or right before one goes to sleep.) The difference is the intent of the breath. If waking up - Mawn. If going to sleep - Yawn
Man takes a large breathe at work in the morning
Boss: "I hope that's a mawn! ha ha ha. I'm a douche."