A reference to an covert monitoring van used by the FBI. Subtly labeled to appear as a florists delivery truck with the name of the company "Flowers By Irene" painted a word per line on the side of the truck to not so subtly form the acronym "FBI" when read vertically.
me: That truck labeled "Flowers By Irene" has been outside for weeks now?!
you: yeah, I would of thought they would have delivered everything by now.