It is similar in context and use, to words like 'Cheers' or 'Aloha' and is used between individuals as a greeting or in some cases a utility word.

Ex: "Thanks for the beer my friend, Hordthk!" or in greeting someone, "Hey Buddy" one says, "Hordthk!" says the other.

As a utility word, "Man, he really Hordthked that beer down, didn't he?" or "Can you Hordthk that screw a little tighter for me?"

Universally it is a representative of positive people and good times and always means, "All is good"

HORDTHK!