In Deep Doo-Doo/Rev's Tree Party Rev & Roll : Season 1 Episode 16

When Rev asks to help beautify the town, he insists there's no job too tough. That is...until he finds out he'll be hauling stinky manure. Rev tries to pawn the job off, until Avery tells him the best way to get it done is to just - "doo-doo" it.