Meaning of onliest in English:

onliest

Pronunciation /ˈəʊnlɪəst/

adjective

informal
non-standard form of only (adjective)
‘you're the onliest man I've seen who has everything’
  • ‘Blues legend Son House, for example, says the penetrating pain of betrayal in sexual relationships is ‘the onliest thing the blues is.’’