Question

خاله زنک بودن

Answer 1

gossip: حرفهای خاله زنکی زدن

gossipy: خاله زنک

to be gossipy: خاله زنک بودن

old wives' tale: قصه خاله زنکی

Answer 2

to be a Busybody

ex: they are just bunch of busybodies.

اونا يه مشت خاله‌زنك هستن

Answer 3

Another variation:

Don’t tell Linda any secrets. She’s such a gossip queen

https://www.englishbaby.com/vocab/word/7087/gossip-queen#:~:text=Definition%20(expr.),She's%20such%20a%20gossip%20queen.