It's that amazing feeling but the complete opposite.
Every word is forced, every thought muddy and brown, your friends no longer seem to have any concern for you, your tired but you cannot sleep, your hungry but eating brings only the feeling that your swallowing a whole apple, this is being twacked. When your twacked you become nothing more than a zombie. You have no soul or feelings. In this state your emotions are brown and muddy, usually non-existant.