Fuck

In early 2017, FX/FXX loosened some of their censorship standards, leading to a general stop of the block on "fuck." It's Always Sunny in Philadelphia is one of the shows to take advantage of this; beginning with Making Dennis Reynolds a Murderer, instances of "fuck" have been left uncensored in the original airings, where they would previously only be audible in the later DVD/BluRay/Streaming releases.