The Collaborative International Dictionary
hob-a-nob
Hobnob \Hob"nob`\, v. i. [imp. & p. p. Hornobbed; p. pr. & vb. n. Hornobbing.]
To drink familiarly (with another). [ Written also hob-a-nob.]
To associate familiarly; to be on intimate terms; as, to hobnob with the political elite.