sell out

Short definition from Wiktionary

Verb

1. 1
   To sell all of a product that is in stock.
2. 2
   To abandon or betray one's principles to seek profit or other personal advantage; to abandon or betray one's supporters through this change.
3. 3
   To betray (a person), usually a close friend or family member, for personal gain.
4. 4
   To sell one's business (with a connotative emphasis on entirety and finality).
5. 5
   To sell one's business (with a connotative emphasis on entirety and finality): To commit or abandon oneself entirely (to a cause, a team, etc.).
6. 6
   To sell one's commission.
7. 7
   To hurry out.

Noun

1. 1
   Alternative form of sellout.