vampire tap
n.— «I had not heard of this usage regarding power consumption until this thread, however “vampire tap” in electronic parlance refers to a piercing type of cable connector, most often a coaxial connector used in Ethernet 10base5 wiring.» —“Re: vampires and power usage” by msg Usenet: alt.home.repair June 15, 2007. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
A Philadelphia, Pennsylvania, listener has been pondering the saying It’s an ill wind that blows nobody good, and specifically whether she uses it correctly. The expression usually appears as It’s an ill wind that blows nobody any good, means that...