What's a cool catch phrase I can use?

My friend uses "Boom!" and I was thinking of, "Ya got me", but Im not sure. What are your suggestions? or:My friend uses \"Boom!\" and I was thinking

My friend uses "Boom!" and I was thinking of, "Ya got me", but I'm not sure. What are your suggestions?

or:My friend uses \"Boom!\" and I was thinking of, \"Ya got me\

or:My favorite was always \"I'm whelmed.\" Occasionally someone will ask \"Do you mean overwhelmed?\" Then I would say \"Uh, no, just whelmed.\"

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