We all know the meaning of LOL  BBL  ROTF

As a senior citicen I've found some I'd like to share:

ATD - At The Doctors
BFF - Best Fiend Fell
BTW - Bring The Wheelchair
BYOT - Bring Your Own Teeth
FWIW - Forgot Where I Was
GGPBL - Gotta Go Pacemaker Battery Low
GHA - Got Heartburn Again
IMHO - Is My Hearingaid On
LMDO - Laughhing My Dentures Out
OMMR - On My Massage Recliner
OMSG - Oh My! Sorry, Gas....
ROFLACGU - Rolling On Floor Laughing And Can't Get Up
TTYL - Talk To You Louder

rofl