How many FOOLs are there?

[Gёггч]

Hiiiiiiiiiiiii:
i find that many words have the meaning of FOOL,such as stupid,idiot,ass,imbecile,moron,ninny. And i also hear many people say dope,gander,jerk,nerd.......
i'd like to know that how do you express when you want to say somebody is stupid.
i always say:Hey,man!You're such an idiot!


Thanks

[Anglika]

I would avoid doing anything quite so rude, unless in fun with a good friend.

[svartnik]

Some euphemisms I like:

You are about as bright as a burnt out 20 watt light bulb.
You are as much use as a hedgehog in a condom factory
Couldn't pour water out of a boot with instructions on the heel
If brains were dynamite, he wouldn’t have enough to blow his hat off
If brains were taxed, he’d get a rebate
Some drink from the fountain of knowledge, he only gargled
You can't call him an idiot, you'll insult all the idiots in the world.