0 to not do what you have promised someone you will do or what you should do because you will get more advantages for yourself if you do something else: --
They've sold out to the oil lobby (= done what these people wanted).
French farmers feel they've been sold out by their government in the negotiations.
NIEUWE WOORDEN
European
May 10, 2021
WOORD VAN DE DAG
Shimmer
sell (sb) out