Definition of slipboard:
(n) :
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.
(n) :
A board sliding in grooves.
(n) :
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.
(n) :
(UK, historical) A sign that slides into a frame on the front of a bus for displaying special messages.