Hob-nob is a colloquial term that means to socialize or mix with people in an informal setting. There are many synonyms for this term, each with a slightly different nuance. For example, to fraternize implies a friendly and easy-going relationship, while to mingle suggests more of a casual interaction. To associate is more formal and typically involves a shared interest or connection. To consort has a slightly negative connotation, suggesting a relationship between people of different social classes or reputations. To hang out is a very informal synonym, frequently used among younger people. Regardless of the word used, hob-nobbing is an integral part of building and maintaining social relationships.