A person, generally Canadian, that becomes slightly too Canadian with their slang or phrases whilst around other English speaking people (US, NZ, UK, AUS, etc.). This can mean a total loss of comprehension for the English speaking people in question, but in a large group of Hellanadians can also lead to alienation.
Hellanadian:- 'Dude, it was so totally whack i was like, dude, what is this kid on, what a baller tho. aight, got to peace now.'
English:- 'Er, what?'
Hellanadian:- 'Hellllla buddy'
English:- 'Are you from Hellanada?'