Green’s Dictionary of Slang

1. to dress, to provide an outfit of clothes.

1910

O. Johnson Varmint 303: It took me all mornin’ and nearly three hundred bucks to rib them guys up – but they’re all desperate, darin’ and dolled up!

2. to create, to flesh out, to embellish.

1905		F. Hutchison Philosophy of Johnny the Gent 53: He ribbed that football game up, an’ then took to the high brush when he seen the finish.
1915		Van Loan ‘The Extra Man’ in Buck Parvin 29: I’m going to rib up this scenario.