also: ガマンくらべ
noun
test of patience; battle of wills; endurance contest
A situation where people compete to see who can endure discomfort, pain, or annoyance the longest. Often used in casual or humorous contexts.
暑い部屋で誰が一番長く座っていられるか、我慢比べをした。
We had an endurance contest to see who could sit the longest in the hot room.
Arguments with him always turn into a battle of wills.