for context - Der Spiegel is one of the well respected publications in the region - https://en.wikipedia.org/wiki/Der_Spiegel
orig in DE - https://archive.is/kt3Aa
It is hard to tell from your joke whether you also mean to propagate that narrative.
It normally means strong social & welfare state, massive workers protections and so on. Nordics could be also labeled as such. Economy is not that performant and often utterly lost when some bigger changes happen on markets, with corresponding economical under-performance.
For extremism, look at proper communists or neo-marxists (aka forced mass takeovers of private businesses and any non-small private properties/ownerships by state, bloody revolution & rule by proletariat aka new elites). There is not much economic performance to speak of.
Socialism is an economic and political system in which the means of production, such as businesses, factories, land, and capital, are owned or controlled by the state, rather than primarily by private individuals and companies.
But it's true that there's been an ongoing political effort to reframe socialism from its original definition to simply meaning a capitalist welfare state with worker protections
Socialism is the precursor to communism, the "dictature or the proletariat" where the message is production are "socialised" or, in clearer terms, nationalised and run by the state. The end goal of socialism is communism, the "class-less state" which is supposed to eventually wither away because it is no longer needed because "everyone is a communist". This last stage with the withered-away state has never and shall never be reached because it goes against human nature which means the true end stage of socialism and communism is the large and oppressive state which defends its necessity by constantly pointing at in- and outside forces which are out to topple it.
Socialism and communism can only work at a small scale, small enough so that everyone really knows everyone and there is no need for a "Party" and the related "party elite" to rule. Even at that small scale conflicts arise - "Johnny got twice as much ice cream as I did, NOT FAIR" - but those tend to be easily settled since everyone knows everyone and there is no "elite" which is treated differently from the rest. At a larger scale that elite quickly succumbs to the same human vices which doom feodalism, crony capitalism and similar systems.
I am disheartened and rather flabbergasted by the way this has to be explained time and time (and time) again. Socialism is BAD, m'kay? Social democracy is OK because it doesn't violate basic human principles which make that people put their personal and familial needs over those of the collective. Socialism and communism do violate those principles which means people rules under them need to constantly be kept in check by the state lest they try to take care of their own needs before serving the collective. That in turn necessitates a large state which begets the "party elite" which turns the whole thing into a twisted form of feudalism where the serfs have to pretend it is all for their own good while the masters feast on the spoils of their labour.
Interesting, why is this spam or off topic? This is absolutely an AI topic that needs to be discussed. Not off-topic. Moderation? Hello?
[1]: to name one: https://fgz-risc.de/forschung/inra-studie