Self-drawing scores higher than winning off someone else's discard.
Tips
culture
In mahjong, there are two ways to complete a hand: 胡 (hú) off another player's discard, or 自摸 by drawing your own winning tile from the wall. 自摸 pays more because all three opponents pay.
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Also exists as a slang term for masturbation; in a mahjong context the meaning is unambiguous.
