A fork of Rural Dictionary
YFMTS stands for 'Your Favourite Martian The Series', an amazing and hilarious YouTube cartoon series, written by Ray William Johnson, creator of Equals Three (=3), Your Favourite Martian and some other online comedy shows.
Person 1: "Oh my gosh! Did you guys see the most recent YFMTS?" Person 2: "Episode #2?" Person 1: "No." Person 2: "Oh, I must've missed it. I bet it was hilarious!" Person 1: "Yeah, it was amazing, as normal! Check it out on YouTube, when you get home!"