sell out (someone/something)

to stop being loyal to someone or something.

He accused Congress of selling out the American people to lawyers who opposed the bill.

I could sell you all out and go straight to the police with this information.

Usage notes: often money is the advantage that is gotten:

Anyone who would sell out his own country for money deserves to go to prison for life.

• have lead in pencil
• have lead in your pencil
• have legs
• have mind on
• have mind on something
• have mixed feelings about
• have mixed feelings about something
• have moments
• have money to burn
• have ... more something than has had hot dinners
• have ... more something than someone has had hot dinners
• have ... more than has had hot dinners
• have ... more than someone has had hot dinners
• have much going for
• have much going for you
• have much time
• have much time someone
• have much time something
• have name in lights
• have name on it
• have name written all over it
• have nose in a book
• have nose in the air
• have nothing between ears
• have nothing between the ears