turn tail
 逃跑,掉頭就跑
 turn tail
      v : flee; take to one's heels; cut and run; "If you see this
          man, run!"; "The burglars escaped before the police
          showed up" [syn: run, scarper, lam, run away, hightail
          it, bunk, head for the hills, take to the woods, escape,
           fly the coop, break away]