bursting at the seams idiom informal
（场所）过于拥挤，快要挤爆了
If a place is bursting at the seams, it has a very large number of people or things in it.
Now that they have six children, their little house is bursting at the seams. 他们现在有6个孩子，他们的小房子都快被挤爆了。