Spock: I’ll have you checkmated your next move.
Kirk: Have I ever mentioned you play a very irritating game of chess, Mister Spock?
Spock: Irritating? Ah, yes. One of your Earth emotions.
(Kirk makes an unexpected move)
Kirk: Certain you don’t know what irritation is?
Spock: The fact one of my ancestors married a human female …
Kirk: Terrible having bad blood like that.
Star Trek – Season 1: Episode 1 – “Where No Man Has Gone Before”