You praise yourself

Explanation

this is one of the elliptical sayings; the full form runs: "You praise yourself, lady, like Astydamas." For Astydamas son of Morsimus, having succeeded in playing Parthenopaeus, was voted worthy of a statue in the theatre. He himself wrote an epigram containing his own praise and brought it to the Council; they voted, as it was offensive, that it should not be inscribed at all. Wherefore the comic poets in mockery used to say, "You praise yourself, lady, like Astydamas."