When one is exasperated, confused, angry, or just plain old hyper, they will type random letters really fast, usually in the J, K, H, L, and M section, or the E, D, F, G, S, and A section. ONLY to be used in chat.
Guy 1: I am so mad at you!
Guy 2: Why??
Guy 1: YOU SLEPT WITH MY GIRLFRIEND.
Guy 2: gjfhngjkgnkj!!! I'm SORRY!
Girl 1: Does he love you?
Girl 2: Yes!!
Girl 1: fghdvadxfgcsdgsdf I CAN'T BELIEVE IT!!