Definition of sicko noun from the Oxford Advanced Learner's Dictionary

 

sicko

 noun
noun
BrE BrE//ˈsɪkəʊ//
 
; NAmE NAmE//ˈsɪkoʊ//
 
(pl. sickos)(informal, especially North American English)
 
jump to other results
a person who gets enjoyment from doing strange and cruel things child molesters and other sickos
See the Oxford Advanced American Dictionary entry: sicko