Dictionary of IBM Jargon
This dictionary is full of so many gems.
arm waving n. A technique used to convey excited dedication to an idea, even though not supported by arguments or facts. “The pitch had much arm waving but little content”. The technique may be attempting to emulate the effect of waving one’s arms (as if trying to fly) near a flock of seagulls [or wild ducks?] who will then all take off together.
rusty iron n. Out-of-date, hard-to-repair equipment that, when it works, does the job better and cheaper than anything to be found in the current sales manual. (Especially true of non-IBM electrical or mechanical tools.) See also pig iron, tired iron.