A promiscuous man who sleeps with people of his choosing and who lives a sexually liberated lifestyle.
Possibly having sexual relationships with more than one person at one time.
Possibly partaking in sexual relations without emotional involvement with a person.
"Aaron? Oh ya he's a bit of a male slut. He's brought home a few different girls from the bars this month."
Amanda: "So if you think I'm a slut, what does that make you?"
Joe: "A male slut."