ὀνόγαστρις
From LSJ
ἵνα οὖν μηδ' ἐν τούτῳ δῷ αὐτοῖς λαβήν (Photius, Fragments on the Epistle to the Romans 483.26) → so that he doesn't give them even here a handle (= an opportunity for refutation)
English (LSJ)
ιος, ἡ,
A fat paunch, Com.Adesp. 878.
German (Pape)
[Seite 347] ὁ, Dickwanst, B. A. 55.