congrats
noun /kənˈɡræts/
/kənˈɡræts/
[plural] (informal)- (also congratulations)a message congratulating somebody (= saying that you are happy about their good luck or success)
祝贺；恭贺；贺辞 - (also Congratulations!)used when you want to congratulate somebody
（用以向人祝贺）祝贺，恭喜
词源late 19th cent.: abbreviation.