Human: What are the most popular types of slang used by teenagers? Assistant: 
The most popular types of slang used by teenagers include acronyms, abbreviations, and slang terms such as “lmao” (laughing my ass off), “bae” (best friend forever), “lit” (literally), “savage”, “bae”, “dawg”, “bae”, “brb” (be right back), “chillax” (relax), “bff” (best friends forever), and “smh” (shaking my head).