Baseball sayings say it all.

The term untrammeled was first popularized by Hall of Fame broadcaster Ernie Harwell when Alan Trammell retired in 1996 as the soft handed hard hitting shortstop of the Detroit Tigers. An excellent hitter and a fine fielder he also played on a team with Cecil Fielder. Alan Trammell was the heart and sole of the team and was a “True” Tiger. The term untrammeled came to mean losing your signature player due to retirement as a well known baseball cliché. Just as “Pulling a Ripken” came to mean being boring and showing up for work every day and “Jetering” has come to mean staying away from celebrity bimbos at the club because they have smelly twats.
(Hey I Jetered that Shortie!, Baseball Slang through the Years, Bill James, The Sporting News Press, 2006)


The keystone partner during those halcyon days of Tiger Supremacy was Sweet Lou Whitaker who had also had a secret. Not many people knew that he was the uncle of Dennis Rodman as his full name was Louis Rodman Whitaker, Jr. Sweet Lou was voted the American League rookie of the Year in 1978 but was most renowned for a habit he shared with his nephew Dennis. When the stress of the game became to much for him he would like to get dressed up in his mothers wedding dress and wear it in the locker room. Baseball has really progressed in recent years so he only endured mild teasing as evidenced by his nickname “Sweet Lou.” After retirement he went into television production and is currently executive producer of the TLC series “Say Yes to the Dress.”
(Hey I Jetered that Shortie!, Baseball Slang through the Years, Bill James, The Sporting News Press, 2006)

The most ambiguous baseball slang phrase actually is in Japanese and references former New York Mets manager Bobby Valentine. As you would find it in Japanese it is spelled
やきゅう すごい へんたい which means “Be my Bobby Valentine.” The exact meaning is obscure but it is believed to mean you should wear a costume with a fake mustache and try to pick up underage Oriental boys on the internet.
(Hey I Jetered that Shortie!, Baseball Slang through the Years, Bill James, The Sporting News Press, 2006)