2) Abbreviation for the unit of measurement, 1 Thibaudeau (approx. width and weight of a beer can).
Girl 2: I was with him last night... he has a tibby!!! :D
A short form for Terabyte - a scale to measure digital data capacities.
A Terabyte equals 1024 Gigabyte or 10^12 bytes (a trillion bytes).
The term tibby is fancy slang to express the unit symbol, TB.
Josh: Andy? You hear me? Hey! 2 tibbies!
(Andy is busy skimming his 12 tibby NAS full of porn and other torrented "linux iso"s - for the next 234 years. In HD. Power of tibbies!)