On the Rat is a more glorified example of On the Rag except in this case the test subject is not wearing a pad, or rag for the case, no, instead a tampon. The Rat comes into it because the string looks like a cute rodent tail hanging out.

Rat

A person who exposes another person's wrongdoings for reasons other than moral outrage or to seek justice. Usually for personal gain, to avoid trouble themselves, or out of jealousy.

The word is sometimes misused by highly immoral people to describe all people who provide incriminating evidence against other people, simply because they dislike the idea of being exposed, and want to associate a negative word with people who expose immorality.

When someone’s acting like a fucking rat.

Someone who tells the cops vital information that leads to an arrest of another person

What’s in my basement.🐀🐀🐀🐀🐀🐀🐀🐀🐀🐀🐀🐀🐀🐀

A snitch. A person who has ""tattled" on another person