When a girl, typically named Laryssa, is randomly spying on, or boredly observing someone or something, or suspiciously looking for something to do. For Laryssa to be bored and gathering useless information about something or someone to possibly use against you in a funny situation, she would be lurking.
Laryssa is bored at home. She trained her cats to use the toilet instead of the litter box. Her cats were on the toilet and looked out the door and caught Laryssa lurking around the corner watching them.
bus boy at work:"damn, look at all that money they left on her table!"
random server:"you better not touch it, Laryssa is somewhere lurking and that bitch will stab you with a used fork!"