Sentence:  I'm writing an <WSD>MSR</WSD> (big surprise there) and I have a scene where M&S do a nice, sensuous slow dance. 
Meaning of the word marked with <WSD> tags:  Mulder/Scully romance; a fanfic involving a romantic relationship between the characters (Fox Mulder) and (Dana Scully) of the "(The X-Files)".