It means goodbye, because it is a homonym for "bye-bye".
The simple and common way to say "bye-bye" when netizens chat and leave is "88". It is equivalent to "goodbye" and is often used informally among friends.
A polite expression used when breaking up to express the hope of meeting again later.
Extended data:
English interpretation 88:
Goodbye; Goodbye.
English example of 88:
1, Perry and I exchanged views.
Perry? And then what? Me? Swapped? Goodbye. ?
She left without even saying "88".
She? Left? No? So what? A lot? As? Say what? "? Goodbye? "
Encyclopedia of network language and its explanation;
1、GG
GG, an early online language in China, means good game. A high-level interstellar competition originated in South Korea. At that time, two high-level players played against each other and both sides played well. Both of them are almost perfect in operation, tactics and consciousness. If the winner is fast enough, he can return before his opponent quits: GG.
2. porridge
Because the pronunciation of porridge and "like" is similar, "like" is often interpreted on the Internet. It is said that the word "porridge you" was invented by a bubble hall gamer in 2004! Now it has become one of the commonly used network languages on the Internet!
3. Bamboo plants
The network word Bambusa bambusa refers to the moderator on the forum. At first, the word "banzhu" came out because of the typing speed needed to reply to posts, and the number of people who just started using smart ABC was a little higher. Over time, it became a common name.
4. Gao Fushuai
Gao Fushuai, an online buzzword, is similar to the "three highs" in the online language of Hong Kong, Macao and Taiwan. Corresponding to "short and poor", it describes a man's perfection in figure, appearance and wealth. He is tall, handsome and rich, which partly coincides with "male god". Mainly in major forums, post bars appear frequently. They are the male gods and idols of all girls.
5. Xi Dapu Ben
Xi Big Ben is a network term (xǐ dà pǔ bēn), also known as "Big Ben", which is the abbreviation form of "Love to hear, make people excited, celebrate with the whole world and tell each other", indicating something that makes everyone happy. Everyone should share, inform each other and celebrate together.