Slip是“溜走、松开”，这个短语是什么意思呢？请看对话：

    A: You look tense. What’s up?

    B: There was a man following me when I left the office, but I gave him the slip on the crowded main street.

    A: Really? Are you sure it’s not your imagination?

    B: I’m pretty sure. He followed me several blocks. I sped up and he sped up; I slowed down and he slowed down.

    Note: This slang term means to “get away from or escape someone who is watching or following you.” Here, used as a noun, “slip” means “escape, as from a grasp, fastening, or restraint.” The use is said to have existed since the mid-1500s.