I’m a DF?

Notice that usually the one slinging insults is the one that it applies the most to? Working the gate at today’s SCCA, have to make sure anyone entering is covered under waiver. Some lokal dude attempts to cruise by on his X-Mart abomination bicycle and I stop him. Says he just wants to ride through to the other gate. Tell him the gate is closed and we are having a car race, which should be obvious to anyone with even half a fried brain. As he leaves he utters a rather uninspired insult. And as he rides by farther away on the outside of the fence he yells it again. Numb futs to you too!