What? sweep with dirty broom a floor inlaid - Horace, Satires 2. 4. 83.
asaroton: genre of mosaic, depicting left over food scraps in a trompe l'oeil manner.
celeberrimus fuit in hoc genere Sosus, qui Pergami stravit quem vocant asaroton oecon, quoniam purgamenta cenae in pavimentis quaeque everri solent velut relicta fecerat parvis e tessellis tinctisque in varios colores.
The most famous in that genre was Sosos who laid at Pergamon what is called the asarotos oikos or unswept room, because on the pavement were represented the débris of a meal, and those things which are normally swept away, as if they had been left there, made of small tesserae of many colours. - Pliny, Natural History 36.184.