A set of three identical tiles; the action of completing such a set in one's hand. Also occasionally as interjection: announcing this action to other players.

To take a discarded tile to complete a set of three identical tiles. Also with object: to pick up (a discarded tile) to make a set of three.

a strong, unpleasant smell

corked wine has a powerful pong

smell strongly and unpleasantly

the place just pongs of dirty clothes