The world's biggest burger is the Big Bob's Texas Belt Buster, made by Bob's BBQ & Grill in Pattaya, Thailand. It weighed in at 35.6 kg (78.5 lb). Link - via Spluch
Actually, the biggest burger is the "Trem Godzilla", made by Trem Bão, in Brazil. It weighs 50kg, and for a mere R$500,00, or about US$230,00 you can eat till you explode. Here's a link with some pictures http://www.eesc2002.hpg.ig.com.br/fotos/12.htm And here's some news about it, but it's in portuguese and i'm too lazy right now to translate it http://www.zill.com.br/home/materia.asp?id=52543
And here's some news about it, but it's in portuguese and i'm too lazy right now to translate it
http://www.zill.com.br/home/materia.asp?id=52543