Dimwits

7 clues
Fools
Dunces
Nincompoops
Noodleheads
Knuckleheads
Fools; blockheads
They're no Einsteins
Similar answers:
Adim
Adime
Adimea
Adimeadozen
Adimple
Agoodimpression
Airdimebag
Anddimestore
Andim
Andimeanit
Andimout
Andimouttahere
Asdim
Asteroidimpact
Atoneaswitsaend
Atoneswitsend
Atwitsend
Badimpressionism
Bedim
Bedims