A person that has mental problems. A person that is sick or has a polluted mind.
Dude THAT guy is a sickoo. He just makes mom jokes all the time trying to be cool in front of his friends. =O
by Jake April 22, 2005
About 70% of the people on this site!
A lot of the people who give definitions to this site are sickos.
by strong badian March 13, 2004
1: A person who is mentally ill (sick)
2: An insult used against anyone with unusual or offensive views.
How can you defend a pedophile you sicko!
by entivore October 6, 2003
one who is perverse, mentally retarded, a psychopath and just plain weird.
stop staring at my boobies you sicko.
by DBZ fan May 10, 2005
Sicko meaning, crazy, insane, wicked, cool
Man, This party is gonna be sicko!
by Vanessa_7777 August 4, 2007
Michael Moore's next movie. It will be a attack on health care, from what I've heard.
by fire pillar December 29, 2005
A man aged over 18 attempting to seduce a vulnerable 15 year old overexcited at sneaking into a venue serving alcohol.
An Adult hitting on a 15 year old girl, what a "sicko"
by frothies May 16, 2011