I had a bit of a DUH moment today, too.
A customer came in today and his wife had told him to buy a new "stockings lamp". I didn't have a clue what that was and he didn't either. He called his wife and with her description and the fact that it was a lamp for in a garden light fixture I finally understood he was asking for a
SOX lamp.
We often have people come up with creative names of their own. My favourite is people asking for a flambéed lamp when they mean a flame lamp (which is a terracotta coloured lamp).