If an animal is on the prowl, it is hunting. If a person is on the prowl, they are hunting for something such as a sexual partner or a business deal.

What does going on the prowl mean?

: to move about or wander stealthily in or as if in search of prey. transitive verb. : to roam over in a predatory manner. prowl.

Is on the prowl an idiom?

slang Looking for a sexual partner. ... slang Actively looking for someone or something. Usually followed by "for." I've been on the prowl for a new television that I can get for a good price.