be as straight as a die

be as straight as a die

1. To be very straight. Primarily heard in the UK and Australia. I get carsick, so I hope the roads we're taking are as straight as a die.2. To be truthful and reliable. Kate would never cheat on an exam—she's as straight as a die. I know Bob's story sounds ridiculous, but I believe him because he's as straight as a die.See also: die, straight