When I speak English I tend to be polite, but depending on the situation I will use cooler English. Words like "man "dude" swearing and so forth. However you need to be sparing with this kind of language, otherwise you sound try hard (maybe this is an Australian term, it means you are trying to hard to be cool) or crude. You also need to know in what situation it is good and what kind of sentences are suited for it.
I would like to cultivate my ability to use this language in Japanese. I want to be able to use the full range of Japanese that a normal adult does and it does feel good to use this language sometimes. I have seen a lot of it used in the real word and in anime but I think not coming off like a douchebag is a subtle thing. Some of the language we have:
じゃねぇ、行きてぇ - Changing the a sound to an e sound and extending it a bit.
おまえ、おめぇ、俺 - Addressing people. I will always use 俺 in a completely casual situation.
ぞ - Used to alert someone to something as if it is of pressing concern
ぜ - Similar to ぞ but somehow not so strong. I can't explain this one well.
さ(1)昨日さクラブに行ってさマイクがいた。- Used to draw the attention of the listener to something in the sentence. This is not so much cool language and is more common in girls speak I think. Can be roughly translated to "you know". IE "Yesterday, you know, I went to the nightclub, you know and Mike was there!". Similar to you know it sounds vulgar if you use it too much.
さ(2)大丈夫さ、行けるさ、できるさ - Used at the end of a sentence to reassure someone of something or to respond to being challenged. IE "このままで失敗するよ" "大丈夫さ". I think only guys use this.
勉強しろ、飲め、行け、取ってくれ - Command form. Often used by high school students.
I generally use bits of pieces of it when I am drunk. Firstly because my inhibitions are lowered and I don't care so much if I sound stupid. It is fun to experiment with. Secondly because it is very much a natural setting for this kind of language.
I also have a friend who always uses it, so I tend to use it with her.
Do you guys know any other ones? Do you use this language? If so, when?
I would like to cultivate my ability to use this language in Japanese. I want to be able to use the full range of Japanese that a normal adult does and it does feel good to use this language sometimes. I have seen a lot of it used in the real word and in anime but I think not coming off like a douchebag is a subtle thing. Some of the language we have:
じゃねぇ、行きてぇ - Changing the a sound to an e sound and extending it a bit.
おまえ、おめぇ、俺 - Addressing people. I will always use 俺 in a completely casual situation.
ぞ - Used to alert someone to something as if it is of pressing concern
ぜ - Similar to ぞ but somehow not so strong. I can't explain this one well.
さ(1)昨日さクラブに行ってさマイクがいた。- Used to draw the attention of the listener to something in the sentence. This is not so much cool language and is more common in girls speak I think. Can be roughly translated to "you know". IE "Yesterday, you know, I went to the nightclub, you know and Mike was there!". Similar to you know it sounds vulgar if you use it too much.
さ(2)大丈夫さ、行けるさ、できるさ - Used at the end of a sentence to reassure someone of something or to respond to being challenged. IE "このままで失敗するよ" "大丈夫さ". I think only guys use this.
勉強しろ、飲め、行け、取ってくれ - Command form. Often used by high school students.
I generally use bits of pieces of it when I am drunk. Firstly because my inhibitions are lowered and I don't care so much if I sound stupid. It is fun to experiment with. Secondly because it is very much a natural setting for this kind of language.
I also have a friend who always uses it, so I tend to use it with her.
Do you guys know any other ones? Do you use this language? If so, when?

