beats me

1. 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]

Related Words

• baffling 
• impenetrable 
• inconceivable 
• mystifying www.thesaurus.com
• opaque 
• puzzling 
• unfathomable 
• unimaginable 
• unintelligible