offsider

[ awf-sahy-der, of- ]
/ ˈɔfˈsaɪ dər, ˈɒf- /

noun Australian.

an assistant or helper.
a follower or supporter of a person or cause.

Origin of offsider

First recorded in 1875–80; offside + -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for offsider

offsider

/ (ˌɒfˈsaɪdə) /

noun

Australian and NZ a partner or assistant

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012