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SigEp

The best fraternity in the world, we are the shit.
Damn the SigEps in Platteville are the shit
by dicksack April 27, 2005
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Sinergy

Energy to do sin for pleasure. (Usually sex, but can involve crime, etc.)
Oh baby, I have the sinergy within,
the energy to have sex, to sin for a grin.
by Yung Hess November 14, 2007
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Sineli

I love Sineli
by lipbxlm April 6, 2021
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"The Sinead Effect"

phrase coined by John Lowell for moderately attractive female artist who becomes the most beautiful woman in the world the second she opens her mouth
Stevie Nicks displayed "The Sinead Effect" during "The Dance" tour in 1997.

Belinda Carlisle and Susanna Hoffs are definitely not "The Sinead Effect" (being hot and slutty in the 80s is an automatic disqualification).
by John Lowell March 31, 2007
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Sinead

Normally Has a Large Forehead
Doesn't get out alot, VERY FIESTY.
Acts Manly, Usually hates Justin Bieber.
Justin - "hey shin head, i hate you"
-sinead cries- Sinead - "I hate you more, im gonna go ride my horsey"
Justin - "Im gonna go ride Lauren!"
by jade JACKSON July 24, 2011
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siney

i saw a siney on your lawn
by siney dickmouth July 17, 2011
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Sinead

Someone who defines themselves. A complete whore.
The subject would say:
'a really cool girl. they generally have a love for emos. can be found in most scene places. they are good looking and have a great sense of humour and personality.
they are generally the radest girls around"

I mean who does it?

In speech one might say: Its as annoying as a Sinead up me hole.
by Billy Banjo April 11, 2007
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