whacked adjective2 •(US, informal) Tired; fatigued.After that all-night party, we were all whacked. •(slang) Intoxicated on drugs.Big Dima said he found it 'very much sexiness' knowing we could hear him getting whacked on speed and fucking Svetlana's rather sparse brains out almost every day. — 2014 formsmore whacked · most whacked