Large/oversized nipples. Indicative of, but not limited to pregnant women.
Bitch, I don't want to see your baby latched onto your sewer caps while you breastfeed in Ukrops.
by Chris G June 11, 2004
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To be so severely constipated that the clogged feces is literally capping the sphincter preventing release.
Carl: please help me Doctor. I'm so constipated.

Doctor. You need more fiber, Carl. Otherwise you will continue to get Sewer Capped like this.

Carl: Sewer Capped? Is that a medical term?
Doctor: Yes. I read it on Urban Dictionary.
by Eaton Holgoode March 29, 2014
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Oversized dark brown nipples that are flush with and the same color as their aureolas.
Sewer caps are boring to play with.
by RheaovChaos May 7, 2015
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when a womans nipples are as large as a sewer cap.
"bitch yo' nipple's remind me of sewer caps."
by fnluvn August 12, 2008
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