This baffles or puzzles me, as in I don't know how he does it—beats me! This term originally may have alluded to a winning poker hand. It may also be related to the even earlier usage of beat for “astonished” or “at a loss.” [Slang; mid-1800s]
I vs. MeIs it “my friends and I,” or “my friends and me?” I is a subject pronoun, and me is an object pronoun. This means I can be used as the subject of a sentence, and me can only be used as the object of one. I can perform an action, while me can only have actions performed upon it. Subject vs. Object Pronouns A subject …
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.