Hot Karl (also Hot Carl) is sexual slang referring to one of several purported acts involving feces. It variously means an act of defecating on one's sexual partner, defecating on someone who is asleep, or hitting someone with a sock full of excrement.
Usage
According to psychologist Anil Aggrawal, it is a synonym for a Cleveland steamer and is part of a coprophilia vocabulary that also includes the Dirty Sanchez.
The term was adopted as a name by rapper Hot Karl. In Chicago a weekly show at ComedySportz is called The Hot Karl. The group Ten in the Swear Jar released a 2005 album Accordion Solo! with a track titled "Hot Karl."
References
Hot Karl (slang) Wikipedia(Text) CC BY-SA