MTBU
n.— «There wasn’t time for the banks to fix the problem if anyone went public with it. Their MTBU was too short. MTBU? That’s “Maximum Time to Belly Up”, as coined by the majestic Donn Parker of Stanford Research Institute.» —“How ATM fraud nearly brought down British banking” by Charles Arthur The Register (U.K.) Oct. 21, 2005. (source: Double-Tongued Dictionary)