also sellout
(~s)
1.
If a play, sports event, or other entertainment is a ~, all the tickets for it are sold.
Their concert there was a ~.
N-COUNT: usu sing, oft N n
2.
If you describe someone’s behaviour as a ~, you disapprove of the fact that they have done something which used to be against their principles, or given in to an opposing group.
For some, his decision to become a Socialist candidate at Sunday’s election was simply a ~.
N-COUNT: usu sing, oft N to n disapproval