Never heard of it until now, had to look it up, couldn't find a decent writeup about it. This link seems to be the best, yet it does not even give a clear definition.
Executive summary of social constructionism: all of reality is socially agreed; nothing is objective.
As per a recent comment this thread is meant to voice contrarian opinions, that is anything this community tends not to agree with. Thus I ask you to post your contrarian views and upvote anything you do not agree with based on personal beliefs. Spam and trolling still needs to be downvoted.