What is the meaning of Chummy?

Friendly:

  1. Naturally and genuinely easy to get along with.

    Naturally and genuinely easy to get along with.

    Making a show of friendliness; attempting to be on intimate terms but insincerely or inappropriately; cozying up.

    On intimate terms:

    In a close friendship or relationship.

    On intimate terms but in an inappropriate way, for dishonest or selfish motives, etc.

    Synonym of chum (friend, pal)

    A boy who works for a chimney sweep.

    Nickname for a person, especially a suspect or criminal.

    A felt hat with a low crown.

    A person or thing with a name that one cannot immediately recall.

    Source: wiktionary.org