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1.
A sick bastard is the worst type of person. Sick bastards enjoy putting IcyHot on toilet seats, giving unwanted love taps, and usually run in pairs.
"What sick bastards would do such a thing? You know there has to be two of them! One of them is probably wearing glasses and the other is probably wearing a hat."
by _Secret Weapon April 28, 2013
 
2.
Noun. Singular.
Synonym: Sick Fuck

Definition: A person whose sense of humor is leaps and bounds more rude and crude than that of the people with whom they associate.
"My WASband wanted to give me a Cleveland Steamer after eating hard boiled eggs and beer. That sick bastard."
by Maven April 15, 2004
 
3.
Purveyor of the world's greatest web-site: Bangedup.com.
Yo, Bangedup.com's sick bastard is pope for hooking us up with those Paris Hilton money shots.
by Sick Bastard May 11, 2004
 
4.
Something you call someone when they seem to be nonchalantly imitating someone who you do not want another of; also used when someone takes something from you or says something disgusting.
At the beginning of the school year John Q. was a sick bastard to Daniel Oulette.
by xlae-x March 25, 2003