Open source. Used in Swedish as Open sås, which have a similar sounding as sauce.
Sourcesense, a European sauce consultancy has signed with proprietary software maker Microsoft to make open sauce software for Office.(from the Inquirer)
A portmanteau of open-source and sauce. Open-sauce is just slang for open-source, meaning you and anyone else can contribute to the project. Anything that's truly open-sauce is also free, Which is called FOSS (or free open source software).
Person 1: "Can I tweak this linux distro?"
Person 2: "Hell yeah brother, it's open-sauce"
Any type of sauce that is free of propitiatory ingredients and procedures. In order for a sauce to be deemed as opensauce, he 'sauce code' must be freely available under a GPLv3 licence for all to see.
Person One: Hello; welcome to Burger King, how can I help you?
Person Two: Hey, could I please get a whopper with cheese, without pickle, onion or tomato?
Person One: Sure, that'll be five dollars.
Person Two: Could I please have that with ketchup that conforms to opensauce standards?
Person One: Sure that'll be three dollars. I should note that you'll have to build it yourself, and Burger King is not responsible for anything you do. Oh, and it tastes like cow shit.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.