Mr. Dreghorn is one of three people who have touched Jesse's hair without him complaining. The other two are Jesse's wife, Becky, and his mother, Irene.
This episode occurs on Christmas Eve. Coincidentally, Mickey Rooney provided the voice of Santa Claus in the claymation specials "Santa Claus is Coming to Town" and "The Year Without a Santa Claus".
The title is a parody of the traditional English Christmas carol "God Rest Ye Merry Gentlemen".