sell out

verb

to compromise or betray one's integrity, values, or principles; to give in to pressure or desire for personal gain
to sell completely, until nothing is left

To sell all of a supply or stock of something.
“They sold out of concert posters yesterday and won't get another shipment until next week.”
“Like when Rosario and I have a really on day, I mean, we could sell this place out of beer, you know.”
To abandon or betray one's principles to seek profit or other personal advantage; to abandon or betray one's supporters through this change.
“It used to be a pleasant little community, until the leaders sold out to the developers.”
“He used to be a voice for the underdog until he sold out.”
To betray (a person), usually a close friend or family member, for personal gain.
“I'll kill him if I see him again; he sold me out.”
To sell one's business (with a connotative emphasis on entirety and finality).
“The owners long resisted buyout offers, but when they were ready to retire, they finally sold out to a competitor.”
To sell one's business (with a connotative emphasis on entirety and finality).
To sell one's commission.
“After the peace of Versailles he resided in England; but, about three years before the breaking out of the Revolution, he sold out his commission in the army and emigrated to New York.”
To hurry out.