dumb as a doornail
someone who is just stupid,
and doesn't even know what doornail means anway so isn't really insulted by the term anyway.
and doesn't even know what doornail means anway so isn't really insulted by the term anyway.
"are you saran wrap?"
"who's that?"
"wow your dumb as a doornail"
"who's that?"
"wow your dumb as a doornail"