Definition
Used to express that someone is extremely bad at doing something, no matter what they try.
完全不擅長
I can't sing to save my life.
我唱歌爛得要命。
He can't dance to save his life; no matter how much he learns, he can't do it well.
他跳舞爛得要命；無論學多少，他都跳不好。
She can't cook to save her life, even something simple like frying an egg is a failure.
她煮飯爛得要命，就連煎蛋這麼簡單的事也失敗。