Truth be told is not the correct meaning on Facebook. On Facebook TBT means "throw back Thursday" and it is accompanied with photos of earlier times.
today's big thing to be tested truth be told text back tomorrow
TBT
Tbt
Tributyltin (TBT) is the chemical compound that causes imposex, a condition where female marine snails develop male sexual characteristics due to exposure to TBT from antifouling paints on ships.
#tbt
Turbos Boost Technology driver
trust be told, thanks but no thanks, or taco bell time
TBT in reference to a picture
No, but mean people may use Facebook.
Inspissator for use in the preparation of TB culture medium (TBT-T100IN)
If you mean this site, yes. You do not have to be on Facebook.