n. The upper arm of an overweight person, referring to the size of the arm (which more closely resembles the thigh due to staggering amounts of arm fat). Most often spotted at buffets, rodeos, NASCAR events, state fairs, Wal-Mart stores, Jerry Springer's television program, and throughout the South. Very often seen in conjunction with thankles.
"Holy crap - that is the fattest arm I have ever seen. They're supposed to be biceps, not thighceps. Your arms look like pillowcases full of cottage cheese. Maybe put the fork down once in a while, mmmkay?"
Me: Is there going to be a game where we can use both the Thighmaster and the controller? Maybe it will be included in a new Zelda Revolution game. Maybe it will be for Star Wars: Jedi Arm And Leg Workout. The sequel might be called Star Wars: Jedi Arm And Leg Workout 2, The Attack Of Evil Fitness Dictator Richard Simmons. I don't know about you, but I'm looking forward to JAALW and JAALW2:TAOEFDRS.