破裂しそう

about to burst

→ 破裂
phrase Rare #29,435
about to burst Describes something that looks likely to burst, rupture, or explode. しそう means “seems likely to” or “about to.”
JA: この風船は破裂しそうだ。
EN: This balloon looks like it's about to burst.

その体はいっぱい感情破裂しそう

Your body feels like it’s about to burst with emotion.

— ソング・オブ・ザ・シー 海のうた (2014)

心臓がドキドキして破裂しそう

My heart is pounding so hard, it feels like it's going to burst!

食べ過ぎて胃が破裂しそうだった

I ate so much that I felt like my stomach was going to burst.