How to say "fail" in Mandarin? (as in "epic fail" in internet memes)
Direct translation of fail would be 失败 

However, in internet context, I think 糗(qiǔ) is more suitable. 

糗 means embarrassing, usually as a result of you failed something...

When used as verb, you would say 出糗, means you did something embarrassing. For example:


  我出糗了