Something you say when you're creeping on someone, and want to freak them out; Something one says to such a creep.
*Mark Zuckerberg likes your picture from 10 months ago*
Mark Zuckerberg: lurk moar
One night stand: awh, that status about you having poison ivy all over your crotch was so sad!
You: Lurk moar, dude! That was seven months ago!!