Variant on the common term ‘cradle snatching’ for someone who is sweet on a much younger honey. If you are not in it for the long haul but simply want to sample the youth for a short while, you are ‘cradle snacking’.
stalking a person to make sure that person is okay.
stalking someone to guarantee that no murderers or other people of less-than-honorable intention are.
The act of lurking just outside the bathroom door when another person is using it, usually accompanied by some attention-seeking noise or behavior, ensuring that that person will acknowledge your presence and hurry up.