To include or exclude.
1808. The judges were proceeding to count out his antagonist [a fighting cock.]The Repertory, Boston, Aug. 2.
1854. When it comes to hunting grizzlies on a pony, jist count me out!Knick. Mag., xliii. 643 (June).
1857. Now I propose that we all just empty our pockets and show what we ve got, she continued in her excited harum-scarum way. Good, says Hiram, count me in.Id., xlix. 185 (Feb.).
1859. In these days of daring Balloonry the Knickerbocker is to be counted in.Id., liv. 559 (Nov.).