RichThesaurus
not the sharpest knife in the drawer
vs
thick as champ
not the sharpest knife in the drawer
noun
Lacking in intelligence; dimwitted.
thick as champ
adj
Very ignorant or foolish, sullen or in a bad temper.
How often have the words
not the sharpest knife in the drawer
and
thick as champ
occurred in a corpus of books?
(source:
Google Ngram Viewer
)