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An abbreviation for a county of Maryland surrounding most of the city of Bawlmurr (Baltimore) filled with wiggers and preppies that is completely useless except for its reputation as a "hotbed" of lacrosse and the vast sea of wiggers.

The kids there think they have money, but that's only because they've only been exposed to Bawlmurr city.

Unlike HoCo and MoCo, no one really lives in McMansions and a garage of European luxury cars. Everyone is either slightly above the poverty line or just plain middle class.

When the kids grow up they get exposure to other parts of Maryland, they realize they're either really white trash or their daddy couldn't hack it in MoCo and HoCo so he settled on BalCo to avoid Bawlmer.

We might not be as rich as MoCo or HoCo but we know we're better than them.

Towson, Parkville, Perry Hall, White Marsh, Rosedale, Essex, Dundalk, Randallstown, Pikesville, Woodlawn, Catonsville.
Person A: Where are you from?
Person B: MoCo.
B: aren't you from MoCo too?
A: nope buddy, I'm from BalCo homie.
B: BalCo? the hell is that?
A: Baltimore County, that's right, all you MoCo kids bow down!
by BalCo February 20, 2006
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A company that sells steroids to baseball players. Now being sued by MLB.
Barry Bond's trainer was one of the big honchos at BALCO. And now Bonds refuses to take a drug test.
by freepablo February 21, 2004
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New favorite chant of Boston Red Sox fans, seeming to overtake yankees suck in popularity this season.
Baaaallll-Cooo Baaaallll-Cooo
by Tragic Story April 19, 2004
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A company that makes steroids. Very well known by the New York Yankees.

Also see:
New York Yankees, Jason Giambi, Alex Rodriguez
Balco is the biggest sponsor of the Yankees. The Yankees were even thinking of changing there logo to a needle to show how they ever win any games.
by Red Sox rock August 07, 2005
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