Double Potassium is absolutely, 100%, incredibly gorgeous and amazing. She makes one of the best friends you'll ever have and she'll always be there for you; to use the word to describe someone, it'd be in the form of an inherent compliment to their beauty or likeness. Someone dubbed Double Potassium usually possesses the traits of: empathy, caring, awesomeness, beauty, and fun.
To know Double Potassium is to know heaven.
Boy 1: Oh, dude, you see double potassium over there?
Boy 2: Yeah, man, she's amazing.
Boy 1: I know, right?!