Definition of tomcats:
(n) :
A tom (male cat).
(n) :
(informal) A promiscuous man.
(v) :
(originally US, informal, of a man) To prowl for sexual gratification.
(n) :
(Southeast Asia) 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.