(games) Russian roulette

burnt residual food / (LGBT) fag hag

(chiefly Kansai) a specific kind of platform geta (wooden clog sandal) worn by maiko (apprentice geisha) during their apprenticeship, with a straight vertical heel and an angled toe (see the image), often lacquered in either black or red

(informal) "Fearsome Russia", a wordplay often used in reaction to surreal modern happenings, dark echoes of the USSR, etc.

(history) the Russian Empire

(uranography) Winter Triangle - a bright asterism of the northern winter sky. Its corners are the stars Betelgeuse, Procyon, and Sirius.

(uranography) Summer Triangle - a bright asterism of the northern summer sky. Its corners are the stars Altair, Deneb, and Vega.

third party, outsider

World War III

(mahjong) big three dragons: a 役満 (yakuman, “limit”) hand with triplets or quads of each of the 三元牌 (sangenpai, “dragon tiles”)