FotR stands for Fit of the Ranger. You see, what actually happened when Sam questioned Aragorn was that he had a fit. They later edited this out to make him seem more noble, but somehow managed to overlook the title.
TTT stands for The Terrible Twos, referring to Faramirs baby daughter who had just entered her second year of ages. Originally, she had a very important part (she accidentally killed Gollum). This too was edited out, and the title left.
ROTK stands for Return Our Troublesome Kangaroo. This refers to the Hobbits demanding back their town Kangaroo in Hobbiton, which the ruffians had stolen. Tolkien decided that this was a stupid idea, and completely destroyed all evidence of it. Unfortunately, being absentminded as he was, he again forgot the title.
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