Definition
A self-picked win is one where the winning tile was drawn from the wall rather than called from a discard, and it is typically paid double by everyone.
The doubling is the standard convention; house rules vary on extra bonuses.
Read the full guide: American Mahjong Scoring: Who Pays What, and Why.
See it on real tiles: the coach reads any hand and names its direction, free, at the free read. Members get the coach on call for their own games.
More terms: Pung, Kong, Quint, Pair, Charleston, Blind pass, Courtesy pass, Joker.