It's very interesting for foreigners to learn Chinese slang.
Tips
usage
俚语 covers informal/colloquial language. For internet-specific slang, Chinese often uses 网络用语 (wǎngluò yòngyǔ) or the loanword 梗 (gěng, meme/joke reference). 俗语 (súyǔ) is a related term but refers specifically to folk sayings and proverbs.
