A Japanese Fool （あほ）

He Says:
aho　（あほ）=fool
Accent is aho. We can use aho to abuse, run the person down.
Aho is used in mostly west Japan (Osaka,Kyoto,Kobe etc).
So it'll more impact to use to Tokyo people(East Japan).

She Says:
Like He said, aho is used mostly in Western Japan, which makes this term "cooler". Essentially it's an insult, but when said among friends, it's more playful teasing. For example, if someone tripped and fell over their own feet, you might call them an aho. But you might also call the guy who cheated on you an aho. (Note that this is not a very strong/angry word. If you were really angry at someone, you'd use other words. Of course, this all depends on the tone and I think you'll know if someone is angry and calling you an aho vs. when you've done something stupid.) Although it gets translated as "fool", that's not really a word that's normal to use in English...I'd translate it more as "jackass" or "dumbass".

The next word will be...ぼけ。