When some one says something completely retarded and out of context with the conversation. Also can be used if an action is really dumb or pointless. You reply with the phrase ok hunter....
Hunter is also the term for retard and can be interchanged in almost any sentence
Dude i love it when unicorns are..... OK HUNTER
random sex noises in french.... OK HUNTER
AHAHAHHAHAHAAHAHA(laughing hysterically and out of control)..... OK HUNTER