ἀεί ποτ' εὖ μὲν ἀσκός εὖ δὲ θύλακος ἅνθρωπός ἐστι → this guy's always good at being a wineskin, and at times a winesack
P. and V. πῶλος, ὁ or ἡ.
of foal, adj.: V. πωλικός.