cutting edge
idiomThe forefront, or position of greatest advancement in some field.
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bleeding edge
Something too new and untested to be reliable or to have any assurance of safety; the figurative place where such things exist.
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edge of the earth
A very remote place.
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edge of the world
A very remote place.
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edge out
To defeat in a contest or a game by a narrow margin of victory.
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live on the edge
To have an adventurous or perilous lifestyle; to behave in a manner which creates risks for oneself.