Is 搏杀 used in jest in 今年剩下一个星期了，继续努力搏杀? In December, I read this in a social network post:


  今年剩下一个星期了，继续努力搏杀！


In English slang, one might say "killing it" to mean performing well. Is this use of 搏杀 figurative, literal, or humorous?
It should be figurative, means "working hard".