Reb means: As a shortened form of Rebecca, 'Reb' functions as an informal given name or nickname, typically used among friends and family in English-speaking contexts. It's a straightforward diminutive, similar. The word is mostly archaic or historical; you will only encounter it in old texts, period drama, or school history rather than current teen conversation. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. This is a food-related word and harmless in itself.