The other definition of perfect pitch:

When you throw a bodhran into a skip (dumpster) to land exactly on top of the banjo that's already in there!

As a bodhran player I appreciated the list of bodhran jokes my friend's son had last Whitby - there were over 100 on it already and he was still adding to it. I hate to think how many there will be this year, especially as he plays one too.