I'm usually pretty sarcastic when I heckle refs/umps. For example, when an ump calls a strike at someones eyes, if there is a ball WAY outside (like..passed ball, wild pitch) within the next inning i'll throw out a "What's the matter, blue? Wasnt that a strike too?" However, most of the time I just go with a good old fashioned "What the , Blue!"..... ..That one got some airtime on opening day...