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1.
Korean word (대박). Means "big win", "great success" or something awesome.
A: Oh my! That song was daebak!
B: I know right!
by Tabeko October 03, 2010
 
2.
The Korean expression to praise something that is big, positive and great. Taeyeon from Korean girl band popularize this word for she often comment on many things that amazed her.
Seohyun: Tiffany is singing so beautifully.
Taeyeon: Tiffany, Daebak!
by seobaby December 09, 2011