Almost anything from Tyson, Here a site with a list too much to mention here. Of course "eating children" and "they come to challenge me with their primitive skills" are classics Mike Tyson quotes: http://kjkolb.tripod.com/homepage/miketysonquotes.html
my favourite tyson quote: "My power is discombobulatingly devastating, I could feel his muscle tissues collapse under my force. It's ludicrous these mortals even attempt to enter my realm."
Ali, to Foreman, trapped on the ropes while Foreman bombs away "Come on George, you aint hit me with anything yet, you hit like a girl":yep
Taurus Sykes comment to my friend after Povetkin fight "My chin is made of glass. You can hit my chin with a ping pong, and I would drop down and ask who threw the wrecking-ball? The name that Povetkin will remember when he is back in home is not mine. Taurus is the name that will bore the minds of the heavyweight division and causes fans to yawn in boredom. It causes mothers to lose interest in this sport and fathers to think that even they could beat me."
It's the truth, when Floyd was active Margarito was hardly known and only became popular the same way Vivian Harris became popular at Light Welter, talking smack about Floyd. Margarito vs Gomez PPV buys(with a solid card) - $30K.
it isnt a very dumb quote but i find it funny: "They were better prepared than we were...Leonard had a blanket in the corner and Duran didn't"