What does パー mean?
パー is a Japanese noun meaning “paper (in rock-paper-scissors)” in English. It can also be translated as “disappearing completely, foolishness” depending on context. It is written as パー in hiragana, and paa in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
グーがチョキに、チョキがパーに、パーはグーに勝つ。
Rock breaks scissors. Scissors cut paper. Paper smothers rock.