bedpost

noun

1. one of the upright supports of a bedstead.
2. bedposts, Bowling. a split in which the seven and ten pins remain standing.

noun

1. any of the four vertical supports at the corners of a bedstead
2. between you and me and the bedpost informal confidentially; in secret

n.

also bed-post, 1590s, from bed (n.) + post (n.1).