What does "freedom of speech" mean to you, and how do you think it should be balanced with responsible discourse?

Everyone seems to have a different opinion on what freedom of speech is. To be clear, the first amendment is:

"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."

I am of the opinion that you can say nearly anything you want (given that it isn't a threat to other's safety) but that does not absolve you of the social consequences. The government can't arrest you for calling someone a slur or being a nazi, but another person can and will knock you the fuck out for it :)