be bouncing off the walls(to be very active and energetic to the point of hyperactivity: The kids are bouncing off the walls! ○ He was bouncing off the walls so I told him to go out for a walkthefreedictionary.comShabe)
crazy busy(толкование: "прикладывать максимальные усилия; делать всё, даже невозможное": We are crazy busy right now. – Мы тут на ушах стоим. ART Vancouver)