Another Japanese Fool （ぼけ）

He Says:
boke　（ぼけ）=fool
It's almost same meaning with aho (yesterday's dirty word), but boke is dirtier and more impact word than aho.
So saying only boke is already so powerful to hurt in itself.
Basically, boke means dementia.
Used in mostly west Japan(Osaka,Kyoto,Kobe etc), so it'll more impact to use to Tokyo people(East Japan).

She Says:
Boke is an angry word. You don't really say it in jest. Boke literally means "senility". It can really hurt someone if you say it, so don't say it to the people you love. Again, this ones gets translated as "fool", but I would say that a more accurate translation to English would be like calling someone a "retard".

The next word is...ばか。