Quark! Quark!
Quackamole.
A Robber Ducky!
His rotten girlfriend split on him.
Banana split so ice creamed!
A physicist is atoms studying themselves, while a biologist is cells that study themselves.
I lost an electron..." The other atom asks "Are you sure " First atom replies, "I'm positive!"
Quark!
Because the quark had a strange flavour