Two gay men. A mentally ill detective (Sherlock Holmes), and a gay ass math professor who kills evil nobility (James Moriarty). The ship comes from a criminally underrated animanga series called "Moriarty the Patriot" (Japanese: 憂国のモリアーティ, Hepburn: Yuukoku no Moriarty). If you happen to see this manga in a Barnes and Noble, be sure to get your hands on it. If you read this manga, you're automatically hot and I love you.
Person: Hey I ship Sherliam and I ready Moriarty the Patriot.
Other person: OMG YOU'RE GAY AND HOT PLEASE MARRY ME
Sherliam Moment, simply put: when one jumps of a bridge, or anything high enough it could result in death, the love interest follows by jumping after them. (+ points for holding each other in the sky and the love interest pushing the other's head into their chest)
Sherliam (the ship name for Sherlock and William(this is only correct in the anime.)) shared this moment in Yuukoku no Moriarty, otherwise known as Moriarty the Patriot. They're gay, in love, smart idiots who totally know it but never say anything about it.
The Sherliam moment is the biggest level of flirt, rizz, whatever, you can have or take or make. Jumping off something high in hopes to save or die with the one you love? Yes. Good. That is some awesome shit.
"Ah... How I wish for someone to share a Sherliam moment with me."
Also has a great personality and doesnt care what others say and gets very jealous and gets very freacky and mostly all the time wants to have sex
She also a great friend or girl friend
Also is very loyal.