The sign is a subtle joke. The shop, now belonging to owner Al Sneed sells feed and seed and due to both words ending with the last section of his name, it is called Sneed's Feed and Seed. Beneath this is an indication that it was formerly Chuck's, as in originally owned by his good friend Charles Tamzarian(nicknamed Chuck). Due to feed and seed's connection with Sneed, the implication is that the store would have the same naming convention when under Chuck; therefore it would be Chuck's Fuck and Suck, presumably a brothel where he sold the service of suck and fuck.
