Superlative form of scabby: most scabby.(adjective)
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Use "scabbiest" in a sentence
"She straggled behind him down a darkened side street into one the scabbiest sections of the French Quarter, past two staggering, booze-soaked Burns and a derelict sleeping in a doorway."
"Thus, they would call their dogs and their asses by his name, and the dogs would be the scabbiest in the streets, and the asses the laziest in the market."
"These minnow-sized feeders nibble at the flakiest or scabbiest regions of one's hands and feet, to reveal the soft layer beneath."