1.
man with ulterior motives who offers to walk a woman home
Literally 'escort wolf' - a man who volunteers to see a woman home, especially late at night, but whose real motive is a romantic or sexual advance rather than genuine concern for her safety. Used warily or jokingly to describe such a man, or the situation itself.
送り狼 literally means 'escort wolf': a man who offers to walk a woman home but whose real aim is to make a move on her rather than to protect her.
Usage
Typically used warily, or jokingly, about a man's offer to walk someone home. Calling a man a 送り狼 signals suspicion of his motives - it does not necessarily mean he acted on them.
Etymology
From the old image of a wolf (狼) trailing a traveler on a mountain path, waiting for the moment the traveler lets their guard down.
Related Words
Related:
狼 (wolf)