Definition
Used to express a lack of willingness to do something due to fatigue or a lack of motivation; to be unwilling to make the effort needed to do something.
懒得去做
I can't be fagged to go to the gym today, I'm just too tired.
我今天没劲去健身房，我太累了。
I can't be fagged to explain this again.
我没劲再解释一次。
He can't be fagged to do his homework, he'd rather just stay at home.
他没劲做作业，宁愿待在家里。