Often used in fashion blogs. Used to describe an outfit that is too coordinated and consists of too many of the same types of colours, patterns, fabrics, accessories, designer pieces, thematic elements, etc. Can also be used in reference to interior design.
FabSugar on Kate Hudson's all grey outfit: "Before this, I didn't know there were degrees of being matchy matchy."
or
A: How do I look?
B: Too matchy matchy, try a different sweater.
An expression of surprise or shock that is an extension of the phrase 'Shit fire' Used primarily by people in the southern and mid western U.S.
"She's going to what? Well if she shaves her head, I'll shit fire and save the matches."
"Shit fire and save the matches! There's no way you really won at the casino."
v. A term meaning that all parties partaking in a smoke-out donate equal parts of their own weed, if they have any. For instance, if G-Dogg and HomeFry are matching bowls, then for every bowl of G-Dogg's weed that they smoke, HomeFry will pack and share a bowl of his own.