I googled it and this is what it said.
stands for blemish balm
, blemish base
, or beblesh balm
(apparently because of a copyright in Korea on the word "blemish"), and in Western markets,beauty balm
. It is a cosmetic item sold mainly in East and Southeast Asia, although larger beauty brands are increasingly introducing BB creams to Western markets.
BB cream is promoted as an all-in-one facial cosmetic product to replace serum, moisturizer, primer, foundation, and sunblock.
It can be worn alone as a tinted moisturizer, over serum and moisturizer as a regular foundation, and under powder, depending on the desired amount of coverage.