As an acronym, this would imply an underlying meaning. Like ABT, and we all know what that stands for. Or is this for malt that has been smoked? That would produce a variant of red beer, which uses toasted malt.
Hmmm how bout V-brew? B-view?
One thing, makes me wanna dust off the old equipment and give 'er another run. One of the Best beers I ever had was a homebrew of mine. Crap..tried 15 times to do it again...failed miserably. Main reason I quit. Ahhh The St. Rich's Dubble...sigh