Dumber Than A Box Of Rocks Edit Meaning

1.

when ur pretty dumb. my mom says this to me all the time.

Ur dumber than a box of rocks

-what?

shut up dumbass

2.

Phrase describing a person who lacks the collective intelligence of a box of rocks; possibly a bit more intelligent or a bit less intelligent than a person who is dumb as a rock.

John lit a match so he could see where the gas was leaking out; he's dumber than a box of rocks.

See idiot, stupidity, dumbness, geology, igneous