Until the very limit; up to the last possible moment or to the breaking point.
彼はぎりぎりまで寝て、朝ごはんを食べる時間がなかった。
He slept until the very last minute and had no time for breakfast.
プロジェクトはぎりぎりまで予算を削って進められた。
The project was pushed forward with the budget cut down to the bare minimum.
ぎりぎりまで交渉を続けたが、合意には至らなかった。
We continued negotiations until the last possible moment, but failed to reach an agreement.