400 Calories 

Supposedly making out for 20 minutes burns 400 calories.

Actually, 400 Kilocalories, but food companies thought it would be easier to denote those things we burn as calories, so what the hell. Apparently metric prefixes are fucking scary.

Chad: "Hey Lisa want to burn 400 calories?"
Lisa: "Sure Chad, but I'm not taking off my pants...yet."
{ 20 minutes later }
Chad: "Wanna burn 400 more."
Lisa: "Let's go for 2000. Take off your pants."

400 Calories by tron.von.tronicus January 8, 2008

Colorado factor

the fact that there is a higher incidence of people(larger percentage of the state population) publicly smoking marijuana or talking about marijuana in the state of Colorado than in any other state of the Union.

The Colorado factor was in full effect at that Paul McCartney concert at the Pepsi Center.

Colorado factor by Sam Barrows January 28, 2006

calories 

tiny, microscopic creatures who live in your closet who sew up your close each night to make them smaller. They do this out of jealousy and hatred for the human race for not recognizing them as existent.

Calories: dude, she did not just put her fav jeans in the closet, get my sewing needles.

calories by slimjimcalorieexterminator February 19, 2012

MC Colors 

Motorcycle Club colors. Each club has a unique club patch (or patches) adorned with the term "MC" that are worn on the riders vest, known as colors.

Yo fool, you aint gettin into dis here bowling alley with them MC colors on. Go put on a sweater-vest.

MC Colors by NunYaBidnis January 24, 2008

Does This Smell Like Chloroform

The method of getting laid with the highest success rate.

Jack: "Hey Dorothy, does this smell like chloroform to you?"
Dorothy: "Hmm let's see..." *smells, faints*
Jack: "Great Success!" *unzips pants*

Does This Smell Like Chloroform by Darthvinder February 16, 2009

colorful

Interesting or diverse. Not drab or boring.

I've added a lot of colorful words to my vocabulary by using urban dictionary.

colorful by Michelle0000 April 16, 2007

Colorado Vampire 

When the girl cuts your dick and then give you head while your bleeding.

My girlfriend pulled a knife and cut my dick and gave me a amazing Colorado vampire.

Colorado Vampire by mayorama218 October 18, 2011