A
joke on a
joke.
"Guy asked me for a quarter for a cup of coffee. So I bit him." -- rupe, joke node.
A priest, a Rabbi, and a lawyer walk into a bar.
The barkeep sez "What is this, a joke?" -- Tem42, Two fish in a tank...
Also, many in Why did the chicken cross the road?.
(Metajoke? Sure I metajoke! I meta lotta jokes!)