From t'other + side + -er. IPA(key): /ˌtʌðə(ɹ)ˈsaɪdə(ɹ)/ <span class="searchmatch">t'othersider</span> (plural t'othersiders) (Australia, Western Australia, informal) A person from the...
t'othersiders plural of <span class="searchmatch">t'othersider</span>...