wastoid in English dictionary wastoid Meanings and definitions of "wastoid" noun (slang, derogatory) A person with a drug or alcohol addiction. noun (slang, derogatory) A person regarded with contempt; a loser. noun (slang, derogatory) An absent-minded or vacuous person. more Grammar and declension of wastoid wastoid (plural wastoids) more Sample sentences with "wastoid" Declension Stem Try again Authors