WHISTLE, SLICK AS A

(informal) completely and entirely clean; without fault or error. Get that nomenclature slick as a whistle, tackle the subject, you'll find out the subject was very easy. - Studying Data Assimilation (9 July 64) neatly; without impediment or trouble; easily. Now, you could clean this up slick as a whistle by putting him on an E-Meter and finding out-just shaking him down for all of his overts.neatly; without impediment or trouble; easily. Now, you could clean this up slick as a whistle by putting him on an E-Meter and finding out--just shaking him down for all of his overts. (colloquial) completely and entirely clean; without fault or error. Get that nomenclature slick as a whistle, tackle the subject, you'll find out the subject was very easy. - Studying Data Assimilation (9 July 64) (colloquial) completely and entirely clean; without fault or error.neatly; without impediment or trouble; easily. (slang) completely and entirely clean; without fault or error. (slang) very smooth; well done