The act of going to a store and seeing how much stuff you can put in the Bottom Of the Basket/shopping cart and walk out with, without getting caught.
Kyle - "Hey have you ever heard of bob?
Stan - "Who's bob?
Kyle - "No b.o.b. it means bottom of basket."
Stan - "Umm, what does that mean?"
Kyle - "Well when we go to the store today, we will go bobin' and see what kind of expensive stuff we can steal by putting it in the bottom rack of the shopping cart. They never bother to check!