Everyone knows him as the local barfly who shows up almost every evening.

barfly 是由 bar（酒吧）和 fly（苍蝇）组成的复合词。字面意思是"酒吧里的苍蝇"，比喻那些像苍蝇一样经常泡在酒吧里的人，指"酒吧常客"或"嗜酒如命的人"。