Monica Geller - "Fat Monica"

"Fat Monica"

It is revealed early in the series that she had been overweight while growing up. Monica lost the weight when she was 18 after she overheard Chandler call her "fat" at Thanksgiving. The writers of the series often used flashbacks to show the overweight Monica (with Courteney Cox wearing a fat suit). In one episode, when the group watched an old prom video and were surprised to see her weight and also saw Rachel before she had a nose job. In another episode where the group remember past Thanksgivings, one flashback reveals why Monica lost all the weight. She heard Chandler tell Ross he didn't want to be stuck in all night with his fat sister, prompting Monica to break down. She lost the weight by Thanksgiving of 1988, Rachel also lost the big nose. In almost every episode that features "Fat Monica", the episode ends with Monica dancing in a funny manner.

In an alternate reality storyline during the show ("The One That Could Have Been"), Monica was overweight but still a professional chef and ended up with Chandler, who was a freelance writer. As revealed in another episode, Monica's weight meant a junior high school member had to play with her on the see-saw rather than someone her own age, and her marching band outfit had to be custom made. Her fatness also explains Ross's hastened eating and Monica tells Rachel that Ross had a therapist due to a recurring bad dream about Monica eating him. Monica's weight is reported to have been the reason for their dog's knee surgery, after she tried to ride him and in a different episode, Ross reveals that she caused their parents' porch swing to break. In an episode where Monica, Chandler and Ross are revealing secrets, Ross tells that after being sent to bed without dinner one night, Monica ate the macaroni glued to her jewelry box. She also tried to eat a squirrel when she attended fat camp.

Another episode reveals that Monica attended fat camp as a child, and was found caught in the barbed wire after trying to catch and eat a squirrel, which she claimed she was trying to help out. Ross revealed in another episode that a nine year old Monica weighed 200 pounds.

Picture of Monica dancing in fat suit: http://friends.wikia.com/wiki/File:Fat_Monica.jpg