1. 9 synonyms for Boneheaded: blockheaded, duncical, duncish, fatheaded, loggerheaded, thickheaded

2. Boneheaded - (used informally) stupid blockheaded, duncical, duncish, fatheaded, loggerheaded, thickheaded, thick-skulled, wooden-headed, thick stupid - lacking or marked by lack of intellectual acuity Based on WordNet 3.0, Farlex clipart collection

3. Here are all the possible meanings and translations of the word Boneheaded. Princeton's WordNet (0.00 / 0 votes)Rate this definition: blockheaded, Boneheaded, duncical, duncish, fatheaded, loggerheaded, thick, thickheaded, thick-skulled, wooden-headed (adj)