a 10
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a 10
Someone or something regarded as perfect or superlative in some way (as on a scale of 1 to 10). This weather is a 10 in my book—lots of sunshine with a cool breeze. A: "Wow, that girl is gorgeous." B: "I know, she's a real 10."
See also: 10
a ten
n. the highest rank on a scale of one to ten. On a scale of one to ten, this pizza’s a ten.
See also: ten