FWIW, Revoltingest, I don't think that you are anything other than a capitalist. I mean, I'm a bit of a capitalist too. We're kindred spirits in that regard. I think capitalism is great, and we should keep it around. The only point where we start to disagree is that capitalism should be the ruling force of the economy.
You are annoyed when people play with definitions in a way that makes their arguments look good. We are more so kindred spirits here, I think. That annoys me too. But the way around that isn't to make the dictionary the boss of defining things. The way to solve that is to go ahead and agree on "fabricated" definitions at the outset of the debate. When the debate is done, you throw those definitions away. But during the debate, you insist that all parties accept the definitions that they agreed to at the outset.
I don't think this is a good way to form official definitions of things. But it's a great way to have discourse with others that doesn't get hung up on definitions right out of the gate.
I don't see this discussion having any definitions that people "played around with," though. This assumes that the definitions that are perceived to look good here are necessarily incorrect per some standard, which may not even exist except in a very narrow scope and in one dictionary definition.
I think adopting some elements of capitalism is the most realistic option for now, and this is a position I have previously reiterated multiple times. Public ownership can't be shoved down the economy's throat through force or authoritarianism, and private ownership is just a necessary element of any prosperous economy. Where I disagree with the idea of narrowly defining socialism is in the insistence that I'm using a "wrong definition" if I don't think public ownership of the means of production is achievable now. That argument pigeonholes the positions of many socialists into a very flawed and overly idealistic model.
There are more variants of socialism than I could study in a year even if I tried. Some are influenced by Marxism (including ones that are direct offshoots thereof, which is why I said that a lot of socialism is a subset of Marxism), some by capitalism, some by movements that long predated Marx, and some by all of those. One definition just won't cut it.