Korean Joke

A friend of a friend of mine told me this joke:
But you will only find this joke funny if

A) You know how to say 'rice' in Korean

B) You have some general background on Justin Timberlake's songs

Question: What did Justin Timberlake say when he dropped rice on the floor?

Highlight between the arrows for the answer:



--------> Dirty "밥" <-----------