A term used to describe the liquid cough syrup containing Codeine. To be swimming in the Red Sea is another way to describe someone who is high on cough Syrup "Codeine"
Person 1: "Bud you still taking that codeine for your bronchitis sickness."
Person 2: "Nigga fuck you I aint sick don't fuck wit me when im trippin"
Person 1: "Bud whats wrong wit you"
Person 2: "Nigga I'm swimming in the red sea, sharks and shit coming from every angle trying to bite my toes off"
Person 1: "Ok just dont drown or nothing like that"