Read this on a website (http://www.kellys.com/joke10.html), quite funna:

One day a drunk man tells the bartender, I bet you $100 that I can bite my right eye. Bartender grinned and said ok you drunk. The drunk pulled out his right fake eye out and bit it. After more drinks the drunk said, bet you $200 I can bite my left eye. Bartender knew it cant be fake so he said ok. The drunk pulls out his dentures and bites his left eye.Bartender gets really mad. Afew more drinks the drunk sais, bet you $400 that if you slide a shot glass down the bar, I can hop on each stool and pee in it without getting a drop on your bar. The bartender knew he couldnt do it so he said ok. He slid the shot glass as fast as he could. the drunk jumped on the stools and peed all over the bar and the water. The bartender jumped up and screamed in joy and happiness because he won $500. In the back he heard a man yelling. He asked whats wrong? the man said, that drunk fool bet me $1000 that he can pee on you and your bar and you would be happy about it!

If it's already been posted then :oops kiss my hairy brown ass.