1. Someone who is incapable of breathing through their nose

2. Someone stupid who is unaware that their mouth is gaping open, often taking in gallons of air and spewing their own dry, bacteria rotten maw into your clean air in your vicinity.

The act of farting and simultaneously shaking one's ass slightly side to side onto a partners face while the partner has mouth open and lies supine on the edge of a suitable surface; eg. a bed, couch, table, etc. This act can either be a mutually agreed upon sex act or a malicious act perpetrated upon someone who leaves themselves in said position while sleeping.

When friend A passes out drunk with their mouth open, friend B deposits semen in the open mouth of friend A. Friend A wakes the following morning and notices a cottony-textured subtance in his/her oral cavity.

When in playing tennis one engages mouth before brain.

baby-bird:

Verb. The act of a cum hungry slut opening her mouth like a baby-bird and waiting for her partner to shoot a huge load of his spunk into her mouth. The position of her mouth is similar to a baby-bird waiting for it's parent to dump regurgitated food into it's mouth.

when you put skittles up ur anus and fart until they blow out into ur partners mouth

when you put skittles up ur anus and fart until they blow out into ur partners mouth