Perhaps we are all overthinking this "TBG"

Pluto stated it is clear as the nose on your face.

Since my nose has been broken many times and wanders all over my face, I resorted to the other senses to sleuth out the answer to "TBG".

Here is a thought...

being the holidays, many of us utilize the sense of taste to the maximum...

perhaps some users lick their test strips prior to using them...

thus

"TBG"

could mean...

"Tastes Better than Gravy"

*CrookedGrinz*