A Noser
When you're about to cum and you shove your pecker up her nose just to make it extra messy. If you're lucky, it comes flying out the other side like a nose spray.
I stuck my dong in her nose and it came out her other nose like a firework!
Blow job gone wrong, now she's got cum in both nostrils.
He blew so hard, it looked like he was sneezing cum.