SYS
See you soon
GB
Goodbye
LOL
Laughing out loud
BRB
Be right back
#TBT
Throwback Thursday. Used when people share old photos.
IMHO
In my humble opinion/In my honest opinion
IDK
I don't know
HW
Homework
AMA
Ask me anything. An AMA is when someone, usually well-known or from an interesting background, goes online and answers questions posted by the community.
RUOK
Are you okay?
BFF
Best friends forever
BTW
By the way
IIRC
If I remember correctly
FAQ
Frequently asked questions. Many sites have an FAQ section.
FYI
For your information
JK
Just kidding