L-U-R-K

verb (used without object)

to lie or wait in concealment, as a person in ambush; remain in or around a place secretly or furtively.

to go furtively; slink; steal.

to exist unperceived or unsuspected.

Chiefly Computers. to read or observe an ongoing discussion without participating in it, as on a message board.

noun, Australian Informal.

an underhand scheme; dodge.

an easy, somewhat lazy or unethical way of earning a living, performing a task, etc.

a hideout.

You know who you are!