I remember when the films came out we'd have some fun at work imitating some of the actors with the most rubbish or hammy accents. Doing a long drawn out "Iseeeeeeldoooooooooooooor!" as spoken by Hugo Weaving at Mount Doom was a fave - usually followed by "Cobber" or "mate".
Trying to say "Mordor" like you were a cat coughing up a furball was another - kind of like "Morchhhhhdurghhhhh" - this was in imitation of Viggo Mortensen. Actually, he may have been trying to say Morgul in that scene, now I think of it, but his accent was so utterly incomprehensible that's what everyone thought he was trying to say
Then there was a weird hybrid of Frodo and Roland from classic 70's/80's era Grange Hill that we'd use if anyone went for lunch, saying "Where are you going, Frodo?" in a girly voice. Only Brits of a certain age will get that one