sellout

noun3

1. •
   The selling of an entire stock of something, especially tickets for an entertainment or sports event.

   • I performed in front of a sellout crowd.
2. •
   (informal) A person who sells out, who compromises their principles for financial gain or some other advantage.

   • The rock star used to be hardcore, but now he's just a sellout.
3. •
   (informal) An action in which principles are compromised for personal gain.