ぎゅう詰づめ

noun which may take the genitive case particle 'no', na-adjective

jam-packed; packed like sardines

Describes a space, container, or vehicle that is extremely crowded or tightly filled with people or things. Often used with に or の.

• 通つう勤きん電でん車しゃはいつもぎゅう詰づめだ。

  The commuter train is always jam-packed.

• かばんに荷に物もつをぎゅう詰づめにした。

  I packed my bag tightly with stuff.