four leaf clover, n.All

The Four-leaf clover is rare because whenever someone picks one, it eliminates the mutation from the gene pool.

The most leaves ever found on a clover is not four, but fifty-six

Why did the guy mix poison ivy with four leaf clover?He thought it might give him a rash of good luck

The Four-leaf clover usually means that he will have good luck if its found by an ambitious man.

The Four-leaf clover is unlucky among clovers because they always get violently plucked when a big killer giant finds them.

Why don't women want to get engaged on St. Patricks Day?Cause they don't want to get a "sham rock"

A Four-leaf clover is not something that makes you lucky. It only signifies that you're lucky enough to find a four-leaf clover.

A Four-leaf clover is increasingly rare because to pick one is to reduce their numbers, and thus to tell evolution that it is bad to be a four leaf clover because you will be killed immediately unlike the three leaf clovers.