doink in English dictionary doink Meanings and definitions of "doink" noun (slang) A fool; a jerk; a worthless person. verb (US, slang, humorous, transitive) To have sexual intercourse with verb (informal, intransitive) To bounce after a collision. more Grammar and declension of doink doink (plural doinks) doink (third-person singular simple present doinks, present participle doinking, simple past and past participle doinked) more Sample sentences with "doink" Declension Stem Try again Available translations Cornish Irish Russian Authors