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2.
The weeds that result from the planting of shit seeds.
Person #1: I've said it before and I'll say it again, when you plant shit seeds you get

Person #2: Shit weeds?

Person #1: Shit weeds, right Randy.
by Mr. Leahy January 26, 2010
 
1.
On the farm, sometimes, weeds will sprout out of cow patties. They are called "shitweeds". The term is also used for a person who is miserably disagreeable, an asshole or a jerk, but has a greater depth of meaning. It represents someone who is bad and worthless (like a weed) who was spawned by something equally worthless (like shit). A person who is a "shitweed" is similar to white trash, a low and base person raised by low and base people.
Man #1: "Did you meet Joan's new boyfriend?"

Man #2: "Yeah, he's a piece of work, isn't he?"

Man #1: "I know him and his family, they are all garbage. The guy is a real shitweed!"
by Juderunner July 26, 2008
 
3.
Cannabis which is home grown but yet when you smoke it all you can taste is dirt.
1) "Dammit Allen, you bought shit weed again."

2) If I wanted to smoke dirt, I would of smoked dirt! This shit weed sucks!
by silentjoe93 May 05, 2010