Burst at the seams

Origin

The phrase "burst at the seams" draws its vivid imagery directly from the very real and often frustrating experience of a garment, bag, or any stitched item being so overstuffed or tight that its seams are on the verge of tearing apart. Imagine a tightly packed suitcase groaning under the strain, or a waistcoat stretched taut over a particularly hearty meal; the threads holding the fabric together literally threatening to give way. This common, physical predicament gave rise to a powerful metaphor for anything—a place, an event, or even a person—that is overwhelmingly full, crowded, or at its absolute capacity, on the brink of collapse or explosion from the sheer pressure within.