Don't take his windup seriously, he was just joking around.

windup 是动词 wind up 的名词形式，由 wind（缠绕、上发条）和 up（向上）组成，原指"上发条"的动作。在俚语中引申为"玩笑、戏弄"的意思，指故意说些夸张或虚假的话来逗乐。