burst at the seams
Be filled to or beyond normal capacity. For example, On her wedding day the church was bursting at the seams, or That was a wonderful meal, but I'm bursting at the seams. This expression alludes to rupturing the seams of a garment too tight for the wearer and is generally used hyperbolically. Also see come apart at the seams.
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.