schmuck

1. N-COUNT If you call someone a schmuck, you mean that they are stupid or you do not like them. 笨蛋[美国英语] [非正式]

I played like a schmuck. I am a schmuck. That's how I feel right now. 我表现得像个笨蛋。我就是个笨蛋。这就是我现在的感觉。