honest or genuine
Origin of dinkum; from dialect, dialectal (Lincolnshire), a fair share of work ; from uncertain or unknown; perhaps
honestly or genuinely
Often in the phrase fair dinkum
Origin of dinkumFrom English dialectal and Australian, work.
(comparative more dinkum, superlative most dinkum)
Unknown, possibly from Lincolnshire dialect. First use (as a noun) from 1888.