Duffbabyhater696969's definitions
A fat kid with a baby looking face and a wide fat chin hanging from his neck who tries to workout and get buff but only results in him looking like a goofy looking shit. This most likely results from them gaining a small amount of muscle but still not being able to get rid of their baby fat. You'll know a duff baby when you see one.
by Duffbabyhater696969 November 12, 2013
Get the duff babymug.