Bibber comes from the verb bib ('to drink, tipple') + agentive -er; bib from Latin bibere ('to drink'). The historical trail runs through bibere in Latin and -er in Old English. Morphologically, bibber is transparent: it draws on the verb bib ('to drink, tipple') + agentive -er. Used as a noun, bibber now means "a person who drinks often or to excess; a tippler", so the present definition can be read against the older forms and meanings. The same lexical family is also visible in related forms such as bib, imbibe, bibulous, and wine-bibber. The result is a borrowed or transmitted form whose modern spelling carries a compact record of its route into English.