More full of bilge or more disgusting and filthy; the comparative form of bilgy.
Comparative form of 'bilgy,' from 'bilge' (Middle Dutch 'bulge') plus the adjective suffix '-y' and comparative '-er'. The evolution shows how a noun (bilge) became an adjective and then developed comparative/superlative forms.
Sailors would compete to describe how absolutely disgusting bilgewater was, so naturally they developed comparative and superlative forms—'bilgier' and 'bilgiest'—to express their mutual disgust!
Complete word intelligence in one call. Free tier — 50 lookups/day.