2 brosefs are walking side by side and their handsgraze each other. They then turn their heads and make eye contact and say nothing. that would be a cawkward moment.
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"