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Related to stop up: stop over
1. To become clogged, plugged, or impassable. I'm calling the plumber right now because the toilet is stopped up again. I hate the way my nose stops up whenever spring starts because of all my allergies.
2. To cause something to become clogged, plugged, or impassable; to fill a hole or gap in something. In this usage, a noun or pronoun can be used between "stop" and "up." We've stopped up the leak with rags for the moment, but that won't hold for very long. Don't use so much toilet paper or you'll stop it up when you flush!
3. To cause someone to become unable to pass stool; to make someone constipated. In this usage, a noun or pronoun can be used between "stop" and "up." Eating so much rice during my time in Japan really stopped me up.
stop something up (with something)
to plug or clog something with something. Gary stopped the sink up with bacon grease. He stopped up the sink with bacon grease. Try not to stop the sink up.
[for something] to become clogged. The sink stopped up again!
Fill a hole or gap, block an opening or passage. For example, We need to stop up the chinks in the walls, or The sink is stopped up; it won't drain. This idiom was at first put simply as stop, the adverb up being added only in the early 1700s.
1. To obstruct some passageway: The fallen leaves stopped up the drainpipe. This nagging cold has stopped my sinuses up.
2. To cause something to become obstructed: The reason the engine malfunctioned was that some mud had stopped up its vents. My sloppy roommate stopped the sink up with leftover food.
3. To become obstructed: Call the plumber; the sink stopped up again.
4. To become constipated: I had stopped up, so I took some laxatives.