알고 보니, 졸려서 먼저나감 Turns out, he/she went out before me due to sleepiness. 알고 보니 : turns out, as it turned out 졸려서 : due to sleepiness. 졸리다 : feel sleepy 먼저 나가다 : go out before someone 나감 is 음슴체 It is a style of chatting language used first in nate.com