/ ˈhɒbnɒb; NAmE ˈhɑːbnɑːb/ verb
( -bb- ) [ v ] hobnob (with sb) ( informal ) to spend a lot of time with sb, especially sb who is rich and/or famous
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WORD ORIGIN
early 19th cent. (in the sense drink together ): from archaic hob or nob , hob and nob , probably meaning give and take , used by two people drinking to each other's health, from dialect hab nab have or not have .