philander in WordNet English dictionary

1. talk or behave amorously, without serious intentions
   "The guys always try to chat up the new secretaries"; "My husband never flirts with other women"
   chat up  flirt  dally  butterfly  coquet  coquette  romance  philander  mash 
   
2. have amorous affairs; of men
   "He has been womanizing for years"
   philander  womanize  womanise