A "Yogiism" is an odd saying attributed to baseball catcher Lawrence "Yogi" Berra. He often mangled sentences when speaking to reporters, so they were often recorded or quickly jotted down. But Yogi once defended himself by saying, "I really didn't say everything I said."
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On baseball: "Ninety percent of the game is half mental."
"Nobody goes there anymore. It's too crowded."
"When you come to a fork in the road, take it."
"I knew the record would stand until it was broken."
"It's déjà vu all over again." (after seeing Mickey Mantle and Roger Maris repeatedly hit back-to-back home runs in the early 1960s)
"You can observe a lot by watching."
"If people don't want to come to the ballpark how are you going to stop them?"
"Always go to other people's funerals, otherwise they won't go to yours."
"I looked like this when I was young, and I still do."
"If you ask me a question I don't know, I'm not going to answer."
"If you can't imitate him, don't copy him."
"It gets late early out there."
Never answer an anonymous letter.