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stuff something up something
to force something upward or up into something. He tried to hide the book by stuffing it up the chimney. Sam stuffed the money he found up the downspout, where he thought no one would find it.
stuff something up
to plug something by stuffing something in its opening. He stuffed the hole up with old newspapers. Liz stuffed up the hole with paper.
1. To pack or fill something completely with a large quantity of something: I can't eat any more—that big meal stuffed me up. We stuffed up the closet with all our old magazines.
2. To cause someone's sinus or nasal passages to be clogged: The flu really stuffed me up. I was stuffed up with a bad cold.
3. To be clogged. Used especially of sinus and nasal passages: My nose stuffs up whenever I catch a cold.