si-r 

a noob counter-strike clan that thinks u hack if u hav a 1-5 record.

Man you noob! you pulled a si-r right there!

si-r by Anonymous March 15, 2003

Si Ran 

The most Amazing girl you will ever meet, she is kind, sweet and breath taking once you meet her you wont ever be satisfied by any other woman. Once you meet her you will want to know her and date her. Every girl strives to become a Si Ran but no one can compete with her. If you know her well enough you can always make her laugh and she will make you laugh. But the worst part about knowing her is that you will never build up the confidence to tell her that you love her.

"i want to ask Si Ran to the dance so much"
"i know she is so amazing"

Si Ran by BigBee May 22, 2013

Si Robertson

Si Robertson is tied for the 2nd most powerful being in existence with Shaggy, and #1 being Gucci Berry. Si Robertson can create anything from anything. He can make a Barrett .50 cal out of 3 sticks,a couple of rubber band, a piece of gum, and some shrapnel. He also gets most of his power from his beard and his special ancient tea that he makes himself.

That man is a true Si Robertson.

Si Robertson by Somoki January 26, 2019

S.I.R. Charge 

Stupid Individual Rate Charge

1. An additional charge or fee added to a bill to reimburse the service provider for the inconvenience of having to deal with the idiotic customer.

"I added a S.I.R. charge to her bill because of the headache she caused me."

S.I.R. Charge by agentlotek October 20, 2015

The S.I.R Movement 

Smart.Interesting.Real people who speak intelligently, and shows class to people around them

The S.I.R Movement isn't for everyone.

The S.I.R Movement by mdiamondz January 17, 2015

The S.I.R Movement 

Smart.Intresting.Real people who Speak intelligently,and shows class to Everyone who deserves it.

The S.I.R Movement isnt for everyone.

The S.I.R Movement by MDiamondz January 17, 2015

S.I.R.P

An acronym for: S-sudden I-immense R-rectal P-pressure. When you get a sudden urge to take a crap. You have an immense pressure in your rectum and you need to rush to the toilet.

Oh my gosh i have to go to the bathroom i have S.I.R.P

Wow that milk really gave me SIRP

S.I.R.P by lilfarter143 August 29, 2013