The slang term "ta-tas" refers to breasts, and while it may be a common term, it may not be appropriate in all situations. There are various synonyms for the word "ta-tas" that can be used instead. Some of the most popular alternatives include "boobs," "breasts," "chest," "bust," "melons," "jugs," "knockers," and "titties." It's important to note that not all synonyms may be appropriate in all settings, so it's essential to consider the audience before using a slang term or synonym for breasts. Being respectful and considerate is always important when choosing the appropriate word to use in conversation.