Taffy was a Welshman
Taffy was a Welshman, Taffy was a thief;
Taffy came to my house and stole a piece of beef.
I went to Taffy’s house, Taffy wasn’t home;
Taffy came to my house and stole a marrow bone.
I went to Taffy’s house, Taffy wasn’t in;
Taffy came to my house and stole a silver pin.
I went to Taffy’s house, Taffy was in bed;
I took up the marrow bone and flung it at his head.
Origin
There are several versions of this rhyme, this is just one of them.
Taffy is the Welsh pronunciation of the name Davey, and has long been a nickname that English people give to Welsh men.