pig Latin

a playful secret language in which each word is spoken beginning with its first vowel and any preceding consonants are moved to the end to form a new syllable with the vowel sound (ā), as “oybay” for boy: a word beginning with a vowel can be handled variously, as in “armay,” “armway,” or “armhay” for arm

See pig Latin in American Heritage Dictionary 4

noun
A jargon systematically formed by the transposition of the initial consonant to the end of the word and the suffixation of an additional syllable, as igpay atinlay for pig Latin.
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