Definition of "slip in" []

• To include (e.g. a certain word or phrase) into a sentence discreetly (verb)
• To enter discreetly (verb)
• To play a subtle pass into someone in a goalscoring position. (verb)

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• "A tiny, spidery scrawl covered the slip in a cipher that few besides Niall knew, none of them in Amador."
• "I wonder how much it would cost me to bribe the clerk into giving me a key to your room so I could slip in here in the middle of the night—"
• "It was hard to say what Reed Spencer Robinson was most famous for: his disguises or his ability to slip in and out of dangerous places unseen."