"a 1" Definition

  1. first-rate, the very best; “she’s a prime girl, she is; she is A 1.”—_Sam Slick_. The highest classification of ships at Lloyd’s; common term in the United States; also at Liverpool and other English seaports. Another, even more intensitive form is “first-class, letter A, No. 1.” Some people choose to say A I, for no reason, however, beyond that of being different from others.

More About a 1

Position in the dictionary: 1 of 4022 slang words.
Next words in the dictionary: abigail, about right, abraham-man, abraham-sham, absquatulate, acres, adam’s ale, added to the list, addlepate, admiral of the red
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The Slang Dictionary's Entry for a 1

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