Mustard in Icelandic, also... penis backwards.
I love to put sinep on my hotdogs.
by Arnarson March 25, 2009
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Palun ulata mulle sinepit. (Please pass me the mustard.)
by Radioactive135 August 17, 2018
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Sinep is practically penis spelled backwards. If you ever get into a fight with someone - but want to keep it PG, instead of saying penis just simply spell it backwards to stop small children from repeating the word for everyone to hear. Although, simple violence bumps it up to a 14A anyway, so its inevitable.
Person 1: "Oh yeah - you wanna fight, c*cksucker?"

Bystander: "Keep it PG, John! There're small children around!"

Person 1: "Fine - you wanna fight, Sinepsucker?"
by Monchoochel December 1, 2016
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Mannnnnn

Mrs. Pino is such a sinep!
by Freetos October 30, 2009
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Penis spelled backwards.

AKA a vagina.
He has a wide sinep.
by Fabio Fobbs January 20, 2012
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A long time ago, an old religious leader with the last name of Sinep preached about the well being of human kind. Trust one another, peace over violence, and to treat one as you would like to be treated. He was a great man, Lord Sinep he was. He did a great many things to push forward the success of mankind

The great prophet Ron Jeremy declared that the soul of Lord Sinep will be set forth upon mankind and be found, and declared the Lord Sinep of his time.
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and its penis backwards
I get on my knees every night and pray to Sinep.
by austin jake September 27, 2006
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