To breathe forcefully through the nose to expel mucus into a tissue. My allergies are so bad right now that I have to blow my nose constantly just to be able to breathe.See also: blow, nose
blow one's nose
to expel mucus and other material from the nose using air pressure from the lungs. Excuse me, I have to blow my nose.Bill blew his nose into his handkerchief.See also: blow, nose