pan-pan
Describes something stretched to its limit from being overfilled. Used for bags, stomachs, or swollen body parts.
💡After a big meal — 'My stomach is pan-pan, I can't eat another bite!'
食べ過ぎてお腹がぱんぱんだ。
I ate too much and my stomach is pan-pan full.
The backpack was ___ with textbooks and notebooks.
リュックが教科書とノートで○○だ。