sell out
US /sel aʊt/
UK /sel aʊt/

1.
to sell all of something, so that there is no more left for people to buy
:
•
The concert tickets sold out in minutes.
•
The new phone model sold out on the first day of release.
2.
to betray one's principles or former associates for personal gain
:
•
Many fans felt the band sold out when they started making commercial music.
•
He was accused of selling out his friends for a promotion.