Performing excellently or perfectly at something; doing something with great skill or earning top marks.
From 'ace' (a skilled person, or the highest playing card worth one point), plus '-ing' (present participle). Originally from Latin 'as' (a unit), the term evolved from card games to mean 'do perfectly.'
Students say 'I'm acing this test,' but the word comes from card games where an 'ace' was the most valuable card—now it's become the most common slang for excellence in any field!
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