(adj) Crazy, messed up, stupid, retarded, or just doesn't make any sense. Usually when you say wacked, you are completely shocked by what you have just seen or experienced. Example: Did you see that? He just chugged a gallon of eggnog. That is wacked.
WACKED
Meaning of WACKED in English
Slang English vocab. Английский сленговый словарь. 2012