I believe the phrase is UNF
Attention Sherlock slashers: you must all go and read this fic immediately:
Talk About the Blind Leading the Visually Challenged, by pforte
The characterization is absolutely stunning...for some reason I've never quite been able to picture these two characters being canonically intimate, but the author has captured both of their voices and motivations so perfectly it's almost eerie.
Q
off you go now, to read and pay worship to the author