To hobnob means to chat and share a laugh and a drink in the presence of other people at a function or party.

hobnob v 1. to mingle, usually with the upper class of society.

The verb hobnob originally meant “to drink together” and occurred as a varying phrase, hob or nob, hob-a-nob, or hob and nob, the first of which is recorded in 1763.

To dip your penis into a friend's drink when visiting the toilet in a bar

when a married woman goes out with an attractive girl friend to a bar or spa party, so she can get her friend to hook her up with a quickie

The cunning art of nudging one person with your 'piece' while mouthing the phrase "huh huh huh"

An unusually girthy Penis, with a flat bell, of an oaty nature.

Another word for tea bagging when you consider how often do you re-dunk a tea bag compared to a biscuit, specially a hobnob.