What does “Not the sharpest knife in the drawer” mean?

Not the sharpest knife in the drawer

Meaning: Not very smart.

No ser el más listo del lugar

Significado: No muy inteligente.

Não ser o mais esperto

Significado: Não muito inteligente.

Avoir un poil dans la main

Signification: Pas très intelligent.

Nicht die hellste Kerze auf der Torte sein

Bedeutung: Nicht sehr schlau.

Non avere la lampadina accesa

Significato: Non molto intelligente.

Zekası pek keskin değil

Anlam: Çok zeki değil.

不太聪明

意思: 不是很聪明。

頭が切れない

意味: あまり賢くない。

머리가 명석하지 않다

의미: 매우 똑똑하지 않음.

Dialogue

13:10:05 - Did you hear that Dave tried to push a pull door for ten minutes?

13:10:09 - Really? He didn't see the sign?

13:10:14 - Apparently not. Let's just say he's not the sharpest knife in the drawer.

13:10:18 - Poor guy. At least he's persistent.