chum

Short definition from Wiktionary

Noun

1. 1
   A friend; a pal.
2. 2
   A roommate, especially in a college or university.
3. 3
   A mixture of (frequently rancid) fish parts and blood, dumped into the water as groundbait to attract predator fish, such as sharks.
4. 4
   A coarse mould for holding the clay while being worked on a whirler, lathe or manually.
5. 5
   Synonym of chum salmon.
6. 6
   A temporary dwelling used by the nomadic Uralic reindeer herders of northwestern Siberia.

Verb

1. 1
   To share rooms with someone; to live together.
2. 2
   To lodge (somebody) with another person or people.
3. 3
   To make friends; to socialize.
4. 4
   To accompany.
5. 5
   To cast chum into the water to attract fish.

Proper noun

1. 1
   A surname.