1. An ancient puebloan culture centered in what is now the Four Corners region of the American Southwest.

2. A brand of outdoor footwear, best known for their river sandals. Some people would say Chacos are how you tell a real outdoors person from a poseur who may be wearing some other type of sandal. Chacos are generally available only from specialty paddling and outdoor specialty shops such as The Trailhead in Buena Vista, Colorado.
Seth - "That dude must be a real river guide."

Clay - "How can you tell?"

Seth - "He's wearing Chacos."
by da Chetster March 19, 2009
A combination of CHAmpagne and COcaine. Not the only way to party but the preferred method of ballers around the world.
Dom P and Cristal popping all over the place and huge line for the bathroom stall = Chaco night

Friend: Dude why the fuck are you calling me at 8am?
Baller: Sipping Dom P and doing lines off the table back in my suite with 20 hot ass chicks we met at the club last night, wanna join us for some chaco?

Baller #1: Damn this hangover is no joke
Baller #2: Fucking chaco...
by Chaco Lover February 4, 2014
the best shoes on this side of the planet. these shoes bring people together and help you explore the world. take your shoes with you rock climbing, or creeking or hammocking. life gets one hundred percent better with chacos
Why aren’t you wearing your chacos?
by briecheese December 4, 2018
I can't believe Brian wanted to name his chaco Heiji, that is such a shit doge name!
by Liu&Fu October 24, 2019
slang for vagina, evoking both chaunch and meat taco
by Simon November 17, 2004
A muffin with a lot of chocolate chips in it. Usually a blue-berry muffin but can sometimes be a banana one. I have actually seen one made of corn.
I want a chaco-chaco chip muffin.
by Bobby Wade October 18, 2007