Canadian slang word for a particular type of hipster who is unironically homosexual (as opposed to the usual ironic faux-faggotry). Originated from an incident in the Railway club in Surrey BC, but has now spread widely across the Toronto gay community.
"Fuck you and your trebbie ways!"
Hipster1: "You are such a fag."
Hipster2: "Atleast I'm not a fucking trebbie."