1. A promiscuous or unfaithful man
   "She discovered her husband was unfaithful to her"; "She discovered her husband was a loose man when she found evidence of his affairs"

Type of: adult male, adulterer, bozo [N. Amer, informal], cat [N. Amer, informal], chappie [Brit, informal], geezer [Brit, informal], guy [informal], hombre [N. Amer, informal], man, sod [informal]