Block one nostril and exhale forcefully through the other to expel a large deposit of snot.
Done when no handkercheif or tissue paper is handy.
Done outdoors.
I could feel the snot in my nose, but I didn't have a handkerchief handy, so I had tofarmer blow.
The process of plugging one nostril, and blowing air out of the other, in order to shoot out mucus. In order to make this technique successful, you must use great force, otherwise you will just look retarded when you have one nostril covered and are breathing heavily in front of your friends. But if you get that dang snot of of there...you will be known as a stud.
Jim had a nasty cold, and didn't have any tissues. He decided a farmer's blow would do lots of good, until he shot it on his girlfriend's prime rib.
noun: to blow a big wad of snot out of one nostril while holding the other nostril closed by pressingon the side of the nose with the index finger or thumb.
When done properly, a farmer blow completely clears the nasal passage and the small amount of snot remaining on your nose can be wiped off on the back of your glove or on your sleeve. Good if you do things outdoors a lot and don't want the mess on a handkerchief in your pocket.