A very large snowman who is insecure about his weight. He seldom looks people in the eye because his massive snowman body is much to shameful to him. But in reality, people view him as a sexy beast.
Dang, look at Fatty Boy struttin himself across that snow!
A term which originated from the Britishcomedy series 'The Office' and has grown to become synonymous with Thomas Cavanagh, alluding to his weight and demeanour.