two-pair wait; waiting to pung either of two pairs
Mahjong term: a tenpai hand with two pairs, waiting to complete either into a pung (triplet) to win.
I declared riichi with a two-pair wait.
A two-pair wait is a shape where you can win by turning either pair into a triplet.
ペンチャン待ち is an edge wait (e.g., 12 waiting for 3), while シャンポン待ち is a pair-based wait.
Standard mahjong term; katakana for シャンポン is typical.
Kanji form using 双碰 for シャンポン; rarely seen.
Mixed kanji-katakana variant; uncommon.
From Chinese 双碰 (shuāng pèng, 'double pung'), borrowed into Japanese mahjong terminology as シャンポン.