tomcat

Short definition from Wiktionary

Noun

1. 1
   A tom (male cat).
2. 2
   A promiscuous man.
3. 3
   An insect of the order Coleoptera referring to certain species of rove beetles, particularly in the genus Paederus. Known for secreting a potent irritant, pederin, which can cause severe skin irritation and blistering when contacted.

Verb

1. 1
   To prowl for sexual gratification.