Word used in fanfiction to denote homosexual pairings. Usually male/male, sometimes female/female AKA femmeslash.
Often used interchangeably with yaoi
Slash originated in the early days of Star Trek fanfiction. Kirk/(slash)Spock.
Also very popular with Harry Potter shippers
...Harry/Draco, Sirius/Lupin, Snape/Lucius, etc..
Sometimes referred to as "yummy slashy goodness"
See also: smut
I am warning you: this is slash! So, if you don't want to see two hot guys getting it on, don't read this fic. Harry/Draco