Also described as a farmer snort
, when you snoz you block one nostril and sharply and quickly breath out through the other nostril, thus expelling mucus/snot. A quick but often dirty way to blow your nose, done when out on the street and don't have access to tissue.
1st person: "Awh that's nasty!"
2nd person: "Sorry, I needed to snoz, I've got a real bad cold."
"You've just snozzed all over me you dirty cunt!"