I myself was in the same scenario. Below is the code which I used for it.
$.validator.setDefaults({
onkeyup: function () {
var originalKeyUp = $.validator.defaults.onkeyup;
var customKeyUp = function (element, event) {
if ($("#your_element")[0] === element) {
return false;
}
else {
return originalKeyUp.call(this, element, event);
}
}
return customKeyUp;
}()
});
Here what I have done is handle keyup events for that element so that validator doesn't do anything. For rest all elements the validator will kick into action. But the catch here is that particular element will have no validation on keyup at all.