During fellatio on a man, the partner places the entire shaft of the penis and both testicles in their mouth. Giving the appearance of someone with the mumps disease.
Ulzzang true definition is "best & "face" = best face in korean. They are basically people with above average looks, sometimes with the use of photoshop and haduri who post their pics online, some becoming internet celebrities.
"Hey, see that chick over there? She's pretty enough to be an ulzzang. :D"