slipboards

Noun

slipboard (plural slipboards)

1. A board sliding in grooves.
   • I ventured to draw back the slipboard on the roof, contrived on purpose to let in air.1726, Jonathan Swift, Gulliver's Travels
   1. (UK, historical) A sign that slides into a frame on the front of a bus for displaying special messages.
      • Despite having transferred from Plumstead to the 25 on 15 January 2005, here is 23032 (LX03 HDZ) in October 2007 making a return visit south of the river, albeit in the Pall Mall view having to carry a slipboard.2016, Matthew Wharmby, The London Bendy Bus: The Bus We Hated
   2. A type of fence consisting of panels or boards held between uprights that have grooves on either side to hold the edges of the two adjacent boards.
      • Slipboard fence as low as $8.67 per 10 foot section.1991, Chronicle of the Horse - Volume 54, Issues 14-26, page 13
2. A list of substitute workers that are available in a union-controlled business, listed in priority order and by the shift they would like to work.
   • The parties agree that, on March 14, 1975, the slipboard was frozen. Extras and substitutes shall continue to be hired from the slipboard when needed in accordance with the provisions of this section.1978, Bulletin of the International Typographical Union - Volumes 66-67, page 18