bubbleheaded Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition adjective. having a silly or foolish personality. Example Sentence She acted bubbleheaded and couldn't answer the question. More Example Sentences He acted bubbleheaded during the serious meeting. Synonyms giddy; foolish; airheaded Antonyms serious; sensible; wise Hear It! Say It! Write It! bubbleheaded Switch to cursive Start Share with your friends: