Robin Laid a Gun Redux

A while back I blogged about the variation of “Jingle Bells” my daughter brought home, in which “Batman Smells” is followed by the strange line “Robin Laid a Gun.” I just noticed that YouTuber Tom Scott has posted a video with a definitive account of the popularity and geographic/demographic variation of many, many versions of “Jingle Bells, Batman smells,” including “Robin laid a gun”: