Champing as in Champion in the making??
Champing as in making Champ Bailey eat his dust??
However..... "chomp" is a dialect variation of "champ", which means to chew vigorously or nervously, to grind the teeth, "champing at the bit" describes the behavior of a horse, anxious to get going. If you have ever ridden horseback you know what that looks like. (The bit, of course is the metal rod in the horse's mouth attached to the reins, with which one controls the animal."
So, no matter how you say it - the good news is Randy Moss is ready to play football and that could mean trouble with a capital "T" as in watch out "D" backs.