Me: Doctor, that fuck mark on my neck really hurts! Please get rid of it!
Doctor: How insulting! My name is Mark, and I cannot remove your tattoo!
Me: It's not a tattoo. It's from my girlfriend, dumbass.
A class of non-gang related graffiti/tagging left by a fuckwad. Often resembling the scrawl of a young child, fuckmarks are distinguishable from street art in that they posses a distinct lack of creativity and artistic talent in both style and message.
In many cases involving fuckmarks, the the fuckwad, when confronted may be delusional and claim to be a talented artist in another large city such as New York or Los Angeles.
I walked down the alley this morning and it was full of fresh fuckmarks.
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.