Sit on (one's) hands informal
To do nothing or ignore the problem or situation needing to be coped with
The famine is stalking this country, yet the government still sits on its hands and expects the assistance of the United Nation.
While every member is trying to solve the problem, I feel so guilty for sitting on my hands.
The boss did nothing but sat on his hands and secretively allowed them to steal my work.
To not want to applaud or to not be eager to applaud
I just sit on my hands while every member pays a lot of compliments to the leader's silly plan.
Almost audience sat on his hands when John finished his speech, which made him incredibly disappointed.
To not care in any way about something or someone
1. To stop, delay or diminish something
2. To ignore or end social contact with someone; to separate someone from others
Although someone is given reliable information, they continue to ignore or misunderstand it.
The verb "sit" should be conjugated according to its tense.