Could you please tell me the meaning of the expression "pull a boneheaded move" ? Hello everyone. I am reading an article with the following paragraph "How can someone so smart be so stupid? We’ve all asked this question after watching a perfectly intelligent friend or relative pull a boneheaded move. " I've already tried to find out the meaning of "pull a boneheaded move" on Google but I didn´t find it. Therefore, could you please help me understand the meaning of this expression? Also I´d like to know if there is an expression (S) with the same meaning, I mean interchangeable as "pull a boneheaded move"? Have a nice day.