A slang term for a man who is more sexually attracted to other men than to women. It is not usually derogatory but it can be sometimes. It has the connotation of a gentleman who is educated and refined and who does not "broadcast" their orientation.
"I don't think Chris wants to have sex with you Lauren - he's sly."
"I was totally plastered and I wanted to have sex with this really really hot guy, but it turned out he's sly, so he just walked me back to my dorm instead."
"I can never make friends with guys unless they're sly. Otherwise they are always staring at my breasts."
A popular phrase in Phoenix, Arizona referring to someone whining. La Llorona (pronounced "lah your-OWN-uh") is the "wailing woman" of Mexican folklore, crying for her children, so calling someone "la llorona" means they cry a lot. I have no idea where the "twinkle twinkle little star" part came from though.
LaQueefah: Why am I single? I'm so fat! Nobody likes me!
LaFawnduh: Ohhh boo hoo la llorona la llorona twinkle twinkle little star! Fucking fug slut.