Definition
to try to benefit from two opposite or contradictory things
Examples
1) The politician was accused of buttering both sides of the bread by
promising to help both the left and the right.
2) The businessman was trying to butter both sides of the bread by making
deals with both the government and the rebels.
Etymology
The phrase is thought to have originated in the early 1900s as a metaphor for
trying to please everyone, even if their interests are opposed.
Synonyms
weigh both sides, explore all angles, leave nothing out
- englishdaily626.com [edited]
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As someone who always butters one side of the bread, say when making a grilled
cheese sandwich, I'd better stay away from business and politics.