I think the story is what he told his mom.
She gave him a list of stuff to buy, and he blew the money on drugs.
"Oh Noes! Groceries was (gasp) stolen!" He proclaimed loudly. "Gimmie some more money and I'll go back. What, your going yourself? OK. I'll watch TV in the basement (and smoke my crack)."
Never, ever trust a Dummie with money or a budget.