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".