You are evidently not a New Yorker and certainly not a Jewish person. Th word Trump used, means defeated badly, beaten badly like In: The New York Mets schlonked the Chicage Cubs, 10-0. It is freely used by all New Yorkers!!!
No I'm proud not to be a New Yorker. My Royals evidentially Schlonked your Mets in the World Series. However the article I read and the spelling had the g rather than the K. The Urban dictionary has a different meaning than what you are saying.
Was wondering what that word meant lol Greg Gufeld on ‘The Five’ was having a temper tantrum over it, and his sidekick, Dana, was cheering him on.