It wasn't me...but...

Hey, I'm just pointing this out... it's not like I take any joy out of sportswriters bitch-slap the "Red Sox Nation"

From ESPN.com's Stump Page 2 column:

Dear Stump Page 2,
Why do "fat chance" and "slim chance" mean the same thing?
-- Danny Low
The answer lies in the delivery. "Fat chance" is sarcastic and ironic, spoken with a smirk; "slim chance" is earnest and sincere. Either way, the effect is the same, making for some interesting mix 'n match possibilities. For example: Boston has a "fat chance" of winning the World Series, no matter how badly New York stumbles. Similarly, Red Sox fans have a "slim chance" of becoming less irritatingly narcissistic, even if their club captures back-to-back-to-back championships.