overflow bit

overflow bit n.  1. [techspeak] A {flag} on some
   processors indicating an attempt to calculate a result too large
   for a register to hold.  2. More generally, an indication of any
   kind of capacity overload condition.  "Well, the {{Ada}}
   description was {baroque} all right, but I could hack it OK
   until they got to the exception handling ... that set my
   overflow bit."  3. The hypothetical bit that will be set if a
   hacker doesn't get to make a trip to the Room of Porcelain
   Fixtures: "I'd better process an internal interrupt before the
   overflow bit gets set".