Fal-gush
Fāl-gūsh is the act of standing in a dark corner spot or behind a fence and listening to the conversations of passersby and trying to interpret their statements or the subject of their dialogue as an answer to one's questions.
Iranians believe that certain days are especially good for divination. During the last Wednesday of the year, called Čahāršanba-sūrī; divination, especially by listening to the conversations of the passers by and interpreting that which is heard (fālgūš) as a sign is quite common.