Ryan Reynolds, Dianna Agron
Credit: O'Neill/White/INFphoto; Gabriel Bouys/AFP/Getty; Time Inc. Digital Studio

The mood has plenty of euphemisms—something or someone revs your engine, floats your boat, turns you on, has you hot ‘n bothered. But one four-letter word sums it up: Sexy. What and who currently epitomize 'sexy'? And, just as crucially, who and what don’t? Take our poll and let us know who and what rock your world. Click "More" to get started.

UPDATE: This poll is now closed.

Justin Bieber
Credit: Christopher Polk/VF11/Getty
Natalie Portman, Jennifer Aniston, Christina Hendricks, Rihanna
Credit: A-way!/; James Whatling/; Jordan Strauss/WireImage; Jeff Kravitz/AMA2010/FilmMagic
Garret Hedlund, Darren Criss, Jesse Williams, Joe Manganiello
Credit: Stephen Lovekin/Getty; Jason LaVeris/FilmMagic; David Livingston/Getty; Michael Kovac/Getty
Idris Elba, Javier Bardem, Vincent Cassel
Credit: George Pimentel/WireImage; Kevin Winter/Getty; Frederick M. Brown/Getty
Dianna Agron
Credit: John Shearer/WireImage; Gabriel Bouys/AFP/Getty
Credit: INFphoto; Cam Griffith/Bauer-Griffin
Justin Timberlake
Credit: Giulio Marcocchi/Sipa; Rob Rich/Everett
Credit: Time Inc. Digital Studio
Ryan Reynolds
Credit: O'Neill/White/INFphoto
Credit: iStockPhoto
Pasta, Chocolate, Sushi
Credit: Rusty Hill/Getty; Natalia Campbell/Getty; Tarick Foteh/Getty
Credit: Nisian Hughes/Getty