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.
You know who you are!