What do you call a lady thief in Tamil?

There isn't one specific word in Tamil for a "lady thief" like there is in English. However, you can use a few options depending on the context and the specific nuance you want to convey:

General terms:

* திருடர் (Thiruḍar): This is the general word for "thief" in Tamil and can be used for both men and women.

* கொள்ளைக்காரர் (KoḷḷaikKārar): This term literally means "robber" and can also be used for both genders.

More specific terms:

* பெண் திருடர் (Peṇ Thiruḍar): This is a literal translation of "lady thief" and emphasizes the gender.

* பெண் கொள்ளைக்காரர் (Peṇ KoḷḷaikKārar): Similar to the above, this emphasizes the gender and means "female robber."

* மெல்லிய திருடர் (Mellī Thiruḍar): This means "sly thief" and could be used to describe a woman who is good at stealing without being noticed.

* பொருள் கொள்ளைக்காரர் (Poruḷ KoḷḷaikKārar): This means "thief of goods" and can be used to emphasize that the woman steals material possessions.

The best word to use will depend on the specific situation and the level of formality you want to convey. For example, "Thiruḍar" or "KoḷḷaikKārar" might be used in a more casual or informal context, while "Peṇ Thiruḍar" or "Peṇ KoḷḷaikKārar" might be used in a more formal or specific context.