An optimum level of drunk. It lies somewhere between "wasted" and "absolutely annihilated" on the drunk spectrum.
A guy is sharkfaced when:
1. He is using the word "bro" to the point that it is very annoying to any "nonbro's" present.
2. He is claiming to have the next game in beer pong once every 3-5 minutes (whether he plays or not is irrelevant. Often, said bro will not even have a partner whilst making his claim. The bro will be told three times that there is a waiting list, then all claims will be ignored for the remainder of the night.).
3. He is trying to explain the musical genius of jack johnson to strangers.
4. He is creating a general feeling of akwardness for any sober individuals present.
Bro #1: Bro, did Chris hook up with that fatty he kept talking to last night?
Bro #2: I don't know... but he was fucking sharkfaced.
the process of shaking your face back and forth from left to right with all of your face muscles relaxed. It is best to take a picture of your shakeface to show off to the bros.
my jaw is killing me after all that shakeface action last night!