be a mystery or bewildering to; "This beats me!"; "Got me--I don't know the answer!"; "a vexing problem"; "This question really stuck me"
If someone is flummoxed by something, they are confused by it and do not know what to do or say. The two leaders were flummoxed by the suggestion. + flummoxed flum·moxed No wonder Josef was feeling a bit flummoxed