Easily confused with the mouse emoji. The rat is one of the twelve zodiac signs in the Chinese horoscope. It is also used negatively as an insult ("to rat on someone") for traitors and untrustworthy persons.
The rat emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the animals and nature
category. Because the rat emoji has been around for quite some time, it should display correctly in the majority of operating systems.