Sense

1. yoho!, one's messmates

Examples

• καίτοι τότε γ’ ἡνίκ’ ἐγὼ ’ζων, οὐκ ἠπίσταντ’ ἀλλ’ ἢ μᾶζαν καλέσαι καὶ ῥυππαπαῖ εἰπεῖν. (Aristophanes, Frogs, Agon, Antepirrheme 1:25)
• δεινότατα γὰρ ἔργων δέδρακε κἀμὲ καὶ τὸ ῥυππαπαῖ. (Aristophanes, Wasps, Episode 1:9)

Source: Henry George Liddell. Robert Scott. "A Greek-English Lexicon". revised and augmented throughout by. Sir Henry Stuart Jones.