Some people don't know what some acronyms stand for. I didn't find a thread for this so here is one.

NIB - NIB stands for New in box
IMO - IMO stands for In my opinion
LOL - THIS ONE IS SUPER OBVIOUS BUT IF YOU ARE A RARE CASE and you dont know this it is Laugh out loud.
TBH - TBH stands for "To be honest"

ROFL - Rolling On the Floor Laughing

Beyblade acronyms
LLD- Lightning L-Drago
MLD - Meteo L-Drago
LDD - L-Drago Destroy
LDG - L-Drago Guardian.
BBP- Big Bang Pegasis.

Most of those can easily be found on the Internet, and personally I encourage everyone to just take the few additional seconds it requires to write the names fully.