I found so many things wearing the Lemming name it's impossible to give a short answer. I did find a blog that is of great value (at least it was to me) and you can find it here: http://apatheticlemming.blogspot.com/p/about-lemmi...
Twinker is equally elusive. Wikipedia says several things, but this one comes first:
"Twink" is a gay slang term describing a young or young-looking gay man (18–23 age category) with a slender, ectomorph build, little or no body hair, and no facial hair. In some societies, the term chick or chicken is preferred. The related term twinkle-toes, which implies that a man is effeminate, tends to be used in a derogatory manner. The terms can be complimentary or pejorative.
I would not use either term just because they tend to slaughter the language. It seems that some, mostly young, tend to change the meanings of and the spelling, of perfectly good words to suit their own cliques or to devise a code. Some seem to think it matters to the rest of us when they chop up our language.
Perhaps they are practicing for careers in espionage.