|Origin:||Probably from Low German or a Scandinavian language|
lurk [intransitive ]
to wait somewhere quietly and secretly, usually because you are going to do something wrong
lurk in/behind/beneath/around etc
She didn't see the figure lurking behind the bushes.
if something such as danger, a feeling etc lurks somewhere, it exists, but you may not see it or know about it:
a dark formless danger, lurking in the shadows
if you lurk in a chat room on the Internet, you read what other people are writing to each other, but you do not write any messages yourself
I think it's sort of creepy how people lurk in chat rooms.