noun:

• someone who withdraws from society (e.g. hides in their room); hikikomori - derogatory term - slang ➜ 引きこもり

noun:

• ice coffee; cold coffee - slang - Kansai dialect

noun:

• dope; narcotic; drug - slang ➜ 麻薬

noun:

• leather jacket - slang

godan ~る verb:

• to grow fat; to become fat - derogatory term - slang ➜ デブ

godan ~る verb:

• to blog - slang

noun:

• message butting in (to a conversation between two other people on a BBS, etc.) - slang

godan ~る verb:

• to search (using the Yahoo search engine) - slang ➜ ググる

noun:

• someone who asks others for answers without first researching by himself - slang

noun:

• keitai-mail friend (someone one keeps in touch with only by typing messages with one's thumb) - obscure term - slang ➜ 親指

noun:

• marriage between two people who met over the Internet - obscure term - slang ➜ パソコン

noun:

• dumb-ass - slang - derogatory term
• delinquent; violent person; rough-looking person - slang - derogatory term

noun / suffix:

• (Internet) troll - abbreviation - slang - derogatory term ➜ 厨房

noun / interjection:

• incredible; fantastic - slang ➜ 神【かみ】

noun:

• null pointer exception (esp. in Java) - IT term
• nonsense; rubbish - esp. ぬるぽ - slang

expression:

• laughing; laughable; LOL - slang

expression:

• laughing my ass off; LMAO; rolling on the floor laughing; ROTFL - slang ➜ ワロス

noun:

• middle-school student - orig. an abbrev. of 中学生の坊や - slang

godan ~る verb:

• to fabricate (stories) (based on alleged behaviour of the Asahi newspaper); to make up - slang - humorous term

noun:

• one-on-one fight; one-to-one fight - slang

godan ~る verb:

• to dis; to diss; to disrespect - slang ➜ ｄｉｓ

noun:

• user name (on an online forum like 2ch where the majority of users post anonymously) - slang - abbreviation ➜ 固定ハンドル
• user who uses a online handle (instead of posting anonymously); namefag - slang - abbreviation ➜ 固定ハンドル

noun:

• anime otaku - slang - abbreviation ➜ アニメ・オタク

noun / ~の noun:

• genuine article; real thing; real deal - 本物 said backwards - slang ➜ 本物【ほんもの】

noun:

• reformed delinquent; former delinquent youth - abbreviation - slang ➜ ヤンキー