When a chicken has its head cut off, involuntary reactions cause it to run for a short time aimlessly in many directions before it dies. This is often times used by a person if they have too much to do in a very short time.
我像一隻無頭蒼蠅，亂飛亂撞一通！
原文字面義：我像被斷了頭的雞一般，盲目地奔跑著。本句俚語，通常用來形容：短時間內有太多事要做，忙得團團轉，不可開交。