原指练功夫出了偏差，不可自救。也形容人对自己感兴趣的事物很入迷，如痴如魔to get carried away with oneself; to be unable to right oneself after a deviation in practicing ; to be possessed by a demon

• 情人节团购千万别走火入魔。

  Make sure not to get carried away by Valentine's Day group deals.

• 刘嘉亮为练习歌曲真是有点“走火入魔”的意思。

  Liu Jialiang has really got a bit carried away with himself with practicing songs.