Cribbage marker is a term used to describe the pieces used to keep track of the score in the card game Cribbage. The two main components of a cribbage marker are the PEG, which is a three-letter word, and the pegboard, which is an eight-letter word. The PEG is a small cylindrical object that is placed into the pegboard, which is a board with a series of holes in it. The pegboard is used to keep track of the score as the game progresses.