when a girl is suckin you off, you then cum in her mouth, when she pulls away you chop her in the throat..making her gag, the cum the comes flying out of her nose..resembling a white dragon

Post coitus, a man ejaculates into their partner's mouth and then proceeds to tickle their partner to cause them to laugh forcing the ejaculate through their nasal cavities and shoot out of their nose, thus creating white whiskers resembling that of a dragon's.

When a woman is going down on a man, right before he ejaculates he pushes down on the back of her head (or punches her in the back of the head) causing he to choke and cough thus shooting the semen out her nose. Like a dragon shooting flames or ice of it's nose.
See, sticky dragon or Ice dragon

When you're giving head and a man is so far to the back of your throat that, when you swallow, some goes up your nose like milk and out your nostrils. Could look like a chinese dragon's white mustache, or breathing ice, fire, steam from out of your nose, like a dragon.

When you're receiving head and right as you climax you shove her head towards you causing a "milk shooting out of your nose" effect with your jizz

When a girl is giving you a blow job, you grab her head and make her deep throat so much the cum goes out her nose.