What is Tell It?
1.
Colloquial teen slang, originating from the eastern seaboard of Australia, specifically the New south wales peninsula. to 'tell it' is to activaly participate in the chosen conversation/context.
example 1(conversation):
cuz1-"hey cuz, i got roots last night"
cuz2-"tell it!"
example 2(context):
cuz1-"hey cuz, theres a party in ettalong tonight"
cuz2-"Should we tell it?"