Glad I knew some new slangs in other languages:) I think I should use some of the slang you guys mentioned like "Cacaso". "Puchika" and "Bolado". Sounds cool!

Here in my country, there are so many but let me mention some of the cool slangs that I like and also usually used by people.

1- Bindass- Cool or carefree person

2- Jhakas- Fantastic   (you guys can use these twos)

3-Chamcha-Sycophant

4-Jugaad- A frugal and innovative solution

5-Dhakkan-Stupid

Some are actually swear-words:

Foda: it means "fuck"/"a fuck", but one can bend it to mean pretty much anything. You can say something is good, great, bad and horrible, using this very word, varying only with intonation.

Tipo (assim): it works pretty much like like in English, like, you know, like.

Bolado: when someones feels a little bit sad (not that really hard sadness, more like that soft one that makes you feel bad about life) but doesn't really know why. One simply feels some bad energy.

Nossa!/Minha Nossa!/ Nossa Senhora!: it's a interjection we use when we are surprised. I love it! Specially in it's full form "Minha Nossa Senhora de (insert one specific Madonna here, preferably an unknown one)!".

@Luisa

Persian (Farsi) is very soft and it is known as rhythmic and musical language...also, Iran was land of poets in past...very good poets like Hafez, Saadi, Ferdowsi, etc...you said: ''your comment made me remember that I have to listen how your language sounds! ''

so, listen to it:

https://www.youtube.com/watch?v=HYczQ2Ivack ;

https://www.youtube.com/watch?v=fghnKg4ItGQ

and then say how is Farsi song for your ears...i am eager to know...

Thanks 

Persian (Farsi):

خفن (khafan): something that is very cool...

اسکل (oskol): stupid

باحال (bahal): cool

پاچه خوار (pachekhar): flattering

تابلو (tablo) : obvious  

سه سوت (sesut) : quick

For the simple reason that I am curious about that, and I want to know them. Besides that, I like to read opinions and information from other people and see if there are mistakes in their writing. I think it's part of the culture for other countries. At least <a ui-sref="user({id:comment.commenter_obj.id})" href="https://www.italki.com/user/3998333" style="background-color: rgb(255, 255, 255);">Filipe</a> and <a ui-sref="user({id:comment.commenter_obj.id})" href="https://www.italki.com/user/3367069" style="background-color: rgb(255, 255, 255);">Sudeep *ସୁଦୀପ*</a> practiced their writing and shared things about their countries. 

Nice day to you!