Superlative form of scrawny: most scrawny.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "scrawniest" in a sentence
"But there's something about Hall -- who morphed into a pretty handsome dude as he got older -- that's always been kind of winning, even when he was at his scrawniest."
"Then their leader named Winter whom we know is the leader, for he is the scrawniest and palest of them all French kisses them and they come back to life with their wounds still intact."
"The GOP and Fox News have been ganging up on the Association of Community Organizations for Reform Now (ACORN) like a couple of bullies picking on the scrawniest kid in the schoolyard -- and they can only push that kid so far until he gives them a well-deserved bloody nose."