it's the kind of face a person makes when someone says something utterly stupid, or when you drop something after you were trying so hard not to. It's like a "WHAT THE HELL" face.
You can also say it whenever something dumb happens. It's kind of like a "okay no" sort of face, you know? Everyone makes it a lot, they just never know it's a jface ;)
sort of like this: =_=
Person 1: I made up a new word today!
Person 2: Cool, what is it?
Person 1: Squinkle.
Person 2: ...jface.
Pronounced, yaf-cob. Jafcob is the act of a lover sticking a raw corn cob into the others anus. The cob is then left for up to an hour and is cooked by the heat of the anus. The corn is then rendered off the cob and eaten by the lovers.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.