A Diddly-Bow is a one string instrument made using a cigar box with a broom-stick neck.
My neighbour knocked on my door one afternoon when I was playing electric guitar, quite loud. He loved what he heard and told me he builds Diddly-Bows and would make one for me.
2 weeks later, he delivered a handmade one for me .... this is in reference to receiving the DBow.