Since Teens have their texting codes (LOL, OMG, TTYL, etc.).
Not to be outdone by these kids, now the oldies can have their our own codes.
ATD - At the Doctor's
BFF - Best Friend's Funeral
BTW - Bring the Wheelchair
BYOT - Bring your own teeth
FWIW - Forgot Where I Was
GGPBL - Gotta Go, Pacemaker Battery Low
GHA - Got Heartburn Again
TOT - Texting on Toilet
TTYL - Talk to You Louder
Hope these help... GGLKI (Gotta Go, Laxative Kicking In)!