When I was a wee `un, listening to Ian & Sylvia singing Down by the Greenwood Sidey-O, and I heard the line "...she took out her wee pen knife...", I always thought they were singing about a "Weepin' Knife". I always wondered what a Weeping Knife was.

Of course, at the same time, when I heard I & S singing "Lonely girls linger by the door", I thought they were singing "No niggers linger by the door" too. And I hear I wasn't the only one.