I know mayweather used it against hatton but ive never seen that punch any were else. if you have any examples of the punch being displayed in another fight can you give me a link and explain what that punch is.
I don't know the exact definition and there may not be one as with many definition it may differ from user to user.
The ever reliable wikipedia states:
"In boxing, a check hook is employed to prevent aggressive boxers from lunging in. There are two parts to the check hook. The first part consists of a regular hook. The second, trickier part involves the footwork. As the opponent lunges in, the boxer should throw the hook and pivot on his lead foot and swing his back foot 180 degrees around. If executed correctly, the aggressive boxer will lunge in and sail harmlessly past his opponent like a bull missing a matador. This is rarely seen in professional boxing as it requires a great disparity in skill level to execute."
However that description seems a little narrow, as per my understanding.
The first text in the Lee Wylie video I posted seems a bit more liberal in what falls under the definition of check hook.
He says it is s hook immediately followed by an evasive step or pivot used to take advantage of an advancing or fully commited opponent.
That sounds about right to me.
As the video shows, some of Floyds evasive maouvres involve moving back or pivoting the rear foot away, as opposed to around the opponent, as stated by the wiki quote.
In fact Lee puts "check" in quotation marks, I believe because some of the shots thrown in that video do not even fall under his broad description.
Like the quick little opportunistic clips to those who drop their back hand and countering the right jab of the southpaw.
He doesn't need his opponent to "fully commit " or lunge in because he possesses the superior hand speed, timing and judgement of distance.
He also doesn't make evasive manouvres in all of those clips because he is comfortable enough in range to stand his ground after landing the hook.