The fictional vampire in the novel Dracula by Bram Stoker.

A strategy, in pontoon or blackjack, in which a player keeps a mental tally of the cards played in order to calculate the probability of certain cards being dealt and therefore obtain an advantage.

(mathematics) a positive integer

A voting system in which voters rank candidates in order of preference and points are awarded to candidates based these rankings. The winning candidate is one with the most points.

(baseball) An at-bat with a count of three balls and two strikes.

(baseball) The number of throws that a pitcher has delivered in a game.

(baseball) A pitch count such that a fastball is likely to be thrown, usually 3-0 or 3-1.

(idiomatic) To attempt to go to sleep by thinking of something boring, traditionally by counting imaginary sheep.

(American football) The situation where the quarterback attempts to draw the defense offside through a deceptive snap count sequence, sometimes accompanied by subtle body movements which simulate the initiation of the play.

(colloquial, rhetorical question, sarcastic, humorous) Used as a retort or comeback, often to deprecate oneself or another for excessive concern or attention to detail.