The hissing snake stands for furtiveness and deception. A person pretends to be your friend, but is badmouthing you behind your back. Also represents a zodiac sign in the Chinese horoscope.
The snake 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 snake emoji has been around for quite some time, it should display correctly in the majority of operating systems.