Slang Definition

2021 Slang Dictionary

Last Updated:

Recently Added Slang

Most Popular Slang

What is SlangDefinition?

SlangDefinition is a modern slang dictionary that provides you with definitions of popular slang words, phrases, acronyms, abbreviations, initialisms and hashtags.

In addition to definitions, we give you examples of how each term can be used (and on what platform), we list similar terms (e.g. hashtag TBT and hashtag FBF) and we give a bit of background about the history of the term and when it was first used.

While some of the slang terms defined on our site are used in real life, many are used exclusively on one or more of the following social media websites:

  • Discord
  • Email
  • Facebook
  • Facebook Messenger
  • Instagram
  • LinkedIn
  • Pinterest
  • Reddit
  • Snapchat
  • Telegram
  • Texting
  • TikTok
  • Tumblr
  • Twitch
  • Twitter
  • WhatsApp
  • YouTube

The Best Internet Slang Dictionary: Detailed & Accurate

Many websites and slang dictionaries have a ton of slang terms and acronyms, but lack accurate, up-to-date definitions, which can be confusing. But we know exactly what you’re looking for and that’s exactly what you’ll get. Each term includes an accurate definition, as well as details such as the term’s history, examples and the context in which it is used, alternative definitions and more.


Slang words and acronyms have always existed, but since personal computers and mobile phones have become popular they have been used more and more. New terms are invented every day, and each week it seems there is a new word or phrase being used by teenagers. Using acronyms makes communication much quicker and easier, but only when you understand them. Acronyms such as LOL (laugh out loud) or BRB (be right back) have become very popular since the internet’s inception, although the LOL has been used before the internet, and Lol is actually a word in various languages. HTML, or HyperText Markup Language, has been around since 1981, the beginning of the internet, and is used to create web pages. Newer terms such as the acronym TBT are actually used as hashtags on social media applications like Instagram.


Hashtags have recently become very popular in social media. Although the hash symbol (#) has been used with computers since the 70s, it was not used in the way hashtags are now until the rise of social media between 2000 and 2010. The term “hash tag” was coined by Stowe Boyd in a blog post. Hashtags generally began on Twitter where users would add tags like #happy or #angry to their tweets. Tweets with the same hashtag would then be grouped together. Other social networks like Facebook and Instagram use hashtags as well. The “love” hashtag (#love) has been tagged to over 180 million photos on Instagram since it was released in October of 2010.

There may be a number of reasons you are on this website. You may want to understand something that your children or grandchildren have been saying, or typing and posting on Facebook. You may want to understand the context of certain references in popular culture. Maybe you want to know the meaning of an acronym that someone sent you in a text message. Whatever the reason, Slang Definition can help you find the meaning of any slang term, hashtag or acronym.