A program that doesn't require installation, meaning you don't need administrator privileges to use it, and doesn't require a crack/keygen. Similar to a preactivated program, except it's all packed into one simple .exe file, with no or very few supporting files.
Started online by child pornography advocates but moved to freedom of speech and expression arguments to justify their beliefs
The standard meaning is "To Revel in the freedom of speech argument to justify any horrid, racist or homophobic terms or expressions"
He's making the classic "portableniche" argument but just because something can be said doesn't mean it should be said.
OMG you're a "portableniche piss stain"