From metafilter, this is an acronym for Single Link You Tube, meaning the writer is lazy and just wants to post one link to youtube with little in the way of explanation.
Ambitious, shrewd, cunning, strong leaders, and achievement-oriented. They also have highly developed senses of self-preservation. This means that Slytherins tend to hesitate before acting, so as to weigh all possible outcomes before deciding exactly what should be done.
People think slytherin are evil just because we go for what others are scared of.
The Slytherin house is one of the most misunderstood house in the books of Harry Potter. Slytherin students have Ambition, Cunning and Resourcefulness. They also value tradition and are born leaders. It is a plus that they are sexy too.
There are many of mixed blood purities in the house. Snape and Tom Riddle were both Half bloods as was Pansy's best friend. There were also a few Muggle borns as mentioned in the DH book.
Slytherin has long since changed from being a pureblood haven and only dishing out bad wizards.
Notable good wizards from Slytherin are Andromeda Tonks and Horace Slughorn.
Slytherins also love hufflepuffs as they are fluffy.
Slytherins are as smart as Ravenclaws but darker, as powerful as Gryffindors but think before they leap and are loyal to their family and friends like a Hufflepuff.
Never tell a Slytherin they aren't a true Slytherin.
Merlin was a Slytherin one of the greatest muggle rights activist.
Slytherin people are so freaking awesome
The Slytherin dorm is under a lake! That is like a free aquarium without having to pay a stupid fee. Put your finger on the window and see if a fish follows it.