chummy

Short definition from Wiktionary

Adjective

1. 1
   Friendly
2. 2
   Friendly: Naturally and genuinely easy to get along with.
3. 3
   Friendly: Making a show of friendliness; attempting to be on intimate terms but insincerely or inappropriately; cozying up.
4. 4
   On intimate terms
5. 5
   On intimate terms: In a close friendship or relationship.
6. 6
   On intimate terms: On intimate terms but in an inappropriate way, for dishonest or selfish motives, etc.

Noun

1. 1
   Synonym of chum (“friend, pal”).
2. 2
   A boy who works for a chimney sweep.
3. 3
   Nickname for a person, especially a suspect or criminal.
4. 4
   A felt hat with a low crown.
5. 5
   A person or thing with a name that one cannot immediately recall.