Definition
An expression of sudden disregard for a previous plan or intention, indicating a decision to do something else.
管他呢，管它去的
I was supposed to go to bed early, but what the hell, I'll just watch one more episode.
我本来应该早点睡觉，但管他的，我要再看一集。
We were supposed to save money, but what the hell, let's go out for a nice dinner.
我们本来应该省钱，但管他的，我们出去吃顿好的吧。
I was supposed to stay home today, but what the hell, I'm going out for a walk now.
我今天本来应该待在家里，但管他的，我现在要出去散步。