On a messageboard or anything similar [i.e THIS BLOG], to browse very often, but without ever posting anything.
That guy is always lurking, but he never posts.
Entering an online discussion after a time spent lurking, esp. if suddenly prompted to do so.
Your ridiculous comments have forced me to delurk.
I know I’m beating around the bush. What I’m trying to say is, if you’re a reader who has never (or rarely) commented, won’t you please speak up today? Even just to say “I’m here.”