sicko 

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

sicko by Jake April 22, 2005

sicko 

About 70% of the people on this site!

A lot of the people who give definitions to this site are sickos.

sicko by strong badian March 13, 2004

Sicko 

Someone who is weird and says odd things and is sarcastic and sometimes disturbing

Ori is a sicko

Sicko by MadsAA January 31, 2015

sicko 

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!

sicko by entivore October 6, 2003

sicko 

one who is perverse, mentally retarded, a psychopath and just plain weird.

stop staring at my boobies you sicko.

sicko by DBZ fan May 10, 2005

Sicko 

A pure menace to society, sicko doesn’t care about most peoples feelings. He gets real disrespectful when provoked or if disrespected first. He is a cool guy just don’t piss him off. If sicko fw you you’re the luckiest person in the world.

Yo you heard of that sicko dude? funniest nigga on earth I fw him heavy.

Sicko by mixedupsicko February 6, 2022

sicko 

Sicko meaning, crazy, insane, wicked, cool

Man, This party is gonna be sicko!

sicko by Vanessa_7777 August 4, 2007