ISTG on Snapchat is an acronym that means I swear to God. It can be used to convey extreme seriousness, exasperation, or surprise, and is mostly used outside of a serious religious context.
STG on Snapchat is the short form for “swear to God.”
IMSG stands for “Instant Message.” It’s a feature on Snapchat that allows you to send messages to other users that will disappear after they’ve been read.
IMS stands for “Instant Messaging Service.” It’s a feature that allows Snapchat users to send messages to each other that disappear after a set amount of time.
LMS ON Snapchat means “Like My Status” and is mostly used with TBH which means “To Be Honest”
LML stands for “laughing mad loud.” It’s used to indicate that something is really funny.
ASL means “age, sex, location” in texting.
LMAO means “laughing my ass off” on Snapchat, WhatsApp, Facebook, Twitter, Instagram, and TikTok and is used when you find something particularly funny.
TWD means “Texting While Driving” on Snapchat, WhatsApp, Facebook, Twitter, Instagram, and TikTok.
SFS on Snapchat is the acronym for ”Shoutout for Shoutout”. When used, it means a Snapchat user is looking for a little shoutout on your Snap.
SFS is also used on Instagram too, and it’s used to promote posts on other pages.
Some Snapchat users use WTW as an abbreviation for “what’s the word” which means asking what’s up with someone. Others use WTW as “what the what” which is an expression of surprise or disbelief. It’s similar to saying “what the heck”.
SCM on Snapchat means “Snapchat Me.” The SCM slang is generally used for suggesting that the recipient text the sender on Snapchat or share selfies with them.
TBT stands for “Throwback Thursday.” It’s a hashtag used on social media to share old photos and memories.
The SS on Snapchat stands for “snapshot.” When you take a screenshot of a snap, the SS will appear in the bottom left corner of the image.
IG stands for “Instagram.” It’s a social media app where users can share photos and videos.
IDEK stands for “I don’t even know.” It’s often used to show that you’re so confused by a situation that you can’t even begin to make sense of it.
HMU in texting is an abbreviation for the phrase “hit me up.” It’s a request for social invitation, usually posted online to announce that you’re looking for something to do and to encourage others to reach out to you.
See also What Does STG Mean On Snapchat?