hobnob
Concise Oxford English Dictionary © 2008 Oxford University Press:
hobnob/ˈhɒbnɒb/
▶verb (hobnobs, hobnobbing, hobnobbed) informal mix socially, especially with those of higher social status.
– origin C19 (in the sense ‘drink together, drink each other's health’): from archaic hob or nob, hob and nob, prob. meaning ‘give and take’.
'hobnob' also found in these Oxford entries:
