To be very lazy and idle, especially when immediate action is required.
shoot first and ask questions later
To take hasty, immediate action with serious consequences, without fir…
sit on one's hands
To remain idle when action is needed, perhaps because of fear, ignoran…
sit tight
To wait patiently; to take no action; to remain quiet or relatively mo…
sit still
To accept, tolerate, or acquiesce.
sit in for
To substitute; to take somebody's place.