MUTTONHEAD Meaning of MUTTONHEAD in English ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ noun : a dull-witted person : oaf• mut·ton·head·ed | ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012