'chub' also refers to a sausage shape. No, I'm not being vulgar here. I mean, do a search for chub and sausage or cheese and you'll find links to Hickory Farms type Christmas Meat packages, where 'Chub' is used to describe the form of a short, fat sausage. 

 Thing is, I'm not sure if this is worth a disambiguation page or anything, since the definition doesn't even show up in Websters.