blue toast means: You will need to rinse your mouth with soap before you can go to a Korean prostitute. (in Community Dictionary, added by Leonor Herrera)
What else does blue toast mean?
- Blue toast occurs when two men are together in the shower. She soaps her tush and then soaps the guy’s penis. Then she flips around and puts the penis between her buttocks. (in Community Dictionary, added by Snafu)