Is there a Latin idiom for praising oneself in classical Latin? In English one can blow one's own horn (there are variants of this saying), but I doubt tuba sua ludere is likely mean the right thing. I am looking for a colorful way to put this, not just "to praise or promote oneself", but colorless suggestions are also welcome if more vivid idioms are nowhere to be found.
Ideally, I would like something that could be considered an idiom — attested several times in a similar meaning. But if there is only a single occurrence of a juicy parable in Cicero, no need to resist sharing it…