as straight as a die
The phrase "as straight as a die" is an idiom that means completely honest, upright, or without deviation from the truth. It originates from dice, which are known for having perfectly straight and equal-sided faces. The expression implies that something or someone is reliable, trustworthy, and lacks any crooked or deceitful behavior.
English is confusing! Why do people say "Pardon my French" when they are speaking English? Because of idioms!
An idiom is a phrase or expression that usually presents a figurative, non-literal meaning attached to the phrase. Does that sound fun? It can be!
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