bursting at the seams
extremely full or crowded The courts are bursting at the seams and might not be able to handle more arrests. The city is absolutely bursting at the seams, and one of the biggest complaints people have is the number of cars.
bursting at the seams
containing an unusually large number of people or things My whole family came to stay for the wedding and our house was bursting at the seams.
Etymology: from the idea that if you wear something much too small for you, it is most likely to tear at a seam (place where two pieces of material are sewn together)