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Definition one:

A recently discovered medical condition affecting the tissue surroundings and meniscus of the human knee. Characterized by malformation and scarring of patellar tissue, sydknee usually requires localized corrective surgery, given that causation is often had by way of prior untreated athletic injuries or genetic deficiencies that can lead to a polio-like paralysis if left untreated.

"Sydknee" is a compoundment of the words "syd" and "knee", with the former term having its roots in digital typefaces. The condition is exceptionally rare, and has generated the vast majority of its notoriety due to a comical (albeit short) article found within a 2009 edition of the "Annals of Internal Medicine". The author, a doctor of osteopathic medicine, poked fun at the unconventional name unsuited for placement within a naming system comprised mostly of Latin, Arabic, and archaic terms.

Definition two:

"Sydknee" is also an alternative spelling of the female name "Sydney". While not one of the most popular names for newborn girls in America, it has been increasing in prevalence and presence, given its usage in a popular and disturbing indie song about underage sex occurring between two siblings.

Why people would choose to name their child after the drug-addicted, whorish, and mentally disturbed character portrayed in the song, I don't know.
Definition one:

After having been injured at a recent soccer game and complaining to her physician about patellar joint pain, unusual patterns of contusion, and general malaise, Wilma's doctor performed a computerized axial scan of the area and diagnosed her with sydknee.

Definition two:

John decided to name his daughter "Sydknee".
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The name for someone who is a really good singer. They are beautiful and confident. Girls named sydnee are amazing and get far in their life and career.
person1: Wow that girl is so successful!!!
Person:2 what do you expect? Her name is sydnee
Sydnee by Funfunfun November 14, 2013
Related Words
She is the most Beautiful girl average is the most great best friend you could ever had she’s so nice she makes you laugh when you needed if you could talk to her if you’re trying and you could tell her all your secrets and she will tell no one Ilysfm sydnee
Tenleigh~sydnee is my sister
Sydnee by 6th grader May 21, 2018
Sydnee is an amazing person who can probably kick your asssssss if she needed to. She tends to makes bitches jealous whenever she goes stuntinn around towwwn. Sydnee's know how to have a good time. Faaahh reaaaaaal.
Dude: "Did you see Sydnee kick that girls ass yesterday?!"
Other dude: "Yeah man! She looked fine as hell during it too!"
Sydnee by craccckkaaa. February 21, 2009
An amazing, sweet, bubly, creative, HILARIOUS, and soo thoughtful. So talented in volleyball and basketball. She is very athletic and nature lover. Everyone likes her and she has the most amzing personality. She is extremly pretty and adorable. i love her :)
Man did you have fun hanging out with sydnee or what?

She is sooo much fun to hang out with.
Sydnee by nicloe cindern May 2, 2011
a beautiful, intelligent girl who has a stunning smile that can brighten anyones day. She is funny, talented, and athletic. Her happiness is contagious and so is her happiness. She has beautiful eyes and hair. Her butt is big as well as her boobs. She is very sexy. She is slim thick with a cute ass. Basically the definition of perfect.
yo dude, did you see that new sydnee chick?
yeah bro id hit that for sure, shes perfect
sydnee by basiccx.sydd October 12, 2016
This Chick Is Very Short-Tempered! Watch out little Bitch! She is also very pretty and will mess you up if you hurt her or ANY of her Friends, close or not. She will be nice to ANYONE, nice or not. She is an all-around party girl. She might be a bitch sometimes, but she will always be there for you. Sydnee will always cuss at any person who gets in her way. Sydnee will sometimes even call her own boyfriend a motherfucker.
Person 1: Sydnee just kicked Khannors ASS!!
Person 2: I thought they were dating
Person 1: Not "were" they "are"
Person 2: DAMN!! I wish they broke up. She is SOOO SEXY!!! I WANT HER FAT ASS!!
Sydnee by KC girl 25 January 12, 2016
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