To excrete fecal matter into a sock and then to hit a person in the face with the sock filled with feces.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Proceding to the act of hot-karling involves one of the following:

1. Any part of sex in which faeces from one partner is found on the other, regardless of the technique. NOTE: the action of defecating on one's self may not be regarded as a "hot karl" but rather as "soiling yourself".

2. A form of assault in which the assailant procedes to fill a tube sock with his own faeces, ready to engage in fierce guerrilla.

When you shit into a tube sock, then hit someone in the face with it and scream "Hot Karl!"

is when you poop in a sock and hit someone in the face with it.

1)The act of leaving feaces on your partners stomach, chest, mouth area while engaging in sexual activity.

2)The act of pooping in a tube sock and smacking them in the face.

"Hot Karl" is a slang term for sex which involves feces. Such variations of a "Hot Karl" are having a bowel movement in your partner's mouth, the female partner giving the male partner fellatio after he has had anal sex with her, or when a parter has a bowel movement on the other partners stomach (usually, the partner getting boweled on has Saran Wrap on his/her stomach).