sleeper; lumber girder
Architectural term for a horizontal timber beam that supports floor joists or other structural elements.
last player of three (in mekuri karuta)
In the card game mekuri karuta, the player who draws the last card among three participants.
The sleeper is an important member that supports the floor joists.
When you become the last player in mekuri karuta, you have the role of turning over the last card.
Compound of 大 (おお, 'big') and 引き (ひき, 'pulling' or 'drawing'), but the exact historical derivation for each sense is uncertain.