I need slang words in Japanese, please.
Not only curse words.I mean, these too, but any slangy patterns of speech.
Thanks ^_^

Question

Answer

"Meccha" is a good one. This means"really..., freakin...,"
You put this before adjective.
(ex): "Meccha Oishii !!"(It's really delicious!!)
       "Meccha Tsukareta!"(I'm really tired!)

Me and my friends use a lot.
Also it's really common among Japanese people, mostly in young people!

Answer

Please give more hints what you are looking for. Japanese slang is so rich and abundant!