tomcat Syllabification: (tom·cat)Pronunciation: /ˈtämˌkat/Translate tomcat | into French | into German | into Spanish Definition of tomcat noun a male domestic cat. informal a sexually aggressive man; a womanizer. verb (tomcats, tomcatting, tomcatted) [no object] informal pursue women promiscuously for sexual gratification:tomcatting all night and sleeping until afternoontomcat in other Oxford dictionaries Definition of tomcat in the British & World English dictionary