"The sign is a subtle joke. The shop is called "Sneed's Feed & Seed", where feed and seed both end in the sound "-eed", thus rhyming with the name of the owner, Sneed. The sign says that the shop was "Formerly Chuck's", implying that the shop was owned by Chuck at some point. So, when Chuck owned the shop, it would have been called "Chuck's F#ck & Suck".
AmmoGuppy
This is what the Simpson wiki says about it.
"The sign is a subtle joke. The shop is called "Sneed's Feed & Seed", where feed and seed both end in the sound "-eed", thus rhyming with the name of the owner, Sneed. The sign says that the shop was "Formerly Chuck's", implying that the shop was owned by Chuck at some point. So, when Chuck owned the shop, it would have been called "Chuck's F#ck & Suck".
TuffNuts
I love this copy pasta so much.