TOMCAT Meaning of TOMCAT in English I. ˈ ̷ ̷ˌ ̷ ̷ nounEtymology: tom + cat 1. : a male cat2. slang : one who tomcats II. intransitive verb slang : cat 2 — often used with around Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012