Conflation of "<span class="searchmatch">hiya</span>" and "how are you doing". Evolution was probably "how are you doing" → "how're you <span class="searchmatch">doin</span>'" → "how're ya <span class="searchmatch">doin</span>'" → "howya <span class="searchmatch">doin</span>'", at which...
accents) <span class="searchmatch">hiya</span> An informal greeting, hi, hello. Synonyms: see Thesaurus:hello <span class="searchmatch">Hiya</span>, love, how's you? <span class="searchmatch">hiya</span> <span class="searchmatch">doin</span>' Onomatopoeic. hi-ya hiyah hi-yah haiya <span class="searchmatch">hiya</span> (martial...