Definition of "femslash"
femslash
noun
uncountable
(fandom slang) Slash fiction that focuses on romantic and/or sexual relationships between female characters.
Quotations
The point of slash is that the orientation of one or more canonical characters is changed, which is why slashing is strongest in fandoms where the source parades heteronormativity or machismo. Kirk/Spock, Bodie/Doyle, Aragorn/Boromir, Darcy/Bingley and Harry/Snape stories all slash their canons, but a story featuring, say, Sebastian Flyte and Anthony Blanche in bed would not be slash, nor would a relationship between two lesbian characters in The L Word qualify as femslash.
2013, John Lennard, London Review of Books, letter, vol. 35, no. 6