ASG

All-Star Game

BABIP

Batting Average on Balls in Play. See the Wikipedia article for more info.
The BABIP gods can turn hard hit balls into outs and routine grounders into seeing eye singles.

CHB

Dan Shaughnessy's nickname that was given to him by former Sox outfielder Carl Everett. Stands for "Curly Haired Boyfriend."

H1N1E6

Dirty Watah's nickname for Julio Lugo. He was named after the swine flu (H1N1) and the fact that he can't go three innings without an error (E6).

Levine\'s Law

The leadoff walk always comes around to score...unless it doesn't.

Masty

Justin Masterson. Also known as The Big Masty.

MFY

Mother F*#@ing Yankees

Nancy

JD Drew's nickname. He sometimes likes to hang out with the Hardy Boys too.

Natinals

The Washington Nationals.

Nomah

Nomar Garciaparra

Stud Who GIDPs

Doug Mirabelli. Also sometimes known as Stud Who Hits Bombs

Stud Who Hits Bombs

Doug Mirabelli. Also sometimes known as Stud Who GIDPs.

Tacoby Bellsbury

Jacoby Ellsbury's nickname (TACOby BELLsbury) after he won everyone in the US a free taco by stealing a base in the 2007 World Series.

Tek

Jason Varitek

The The Angeles Angels of Anaheim

The Los Angeles Angels of Anaheim, as translated into English.

Tiggers

The Detroit Tigers

Twinkies

The Minnesota Twins

Vampire Killer

Jason Bay's nickname, since he destroys closers such as The Fruitbat (Mariano Rivera).