When a male or female is just attractive enough that you would potentially shake you're hand in the "so-so" action. This being when your hand is held out and rocked back and forth to give an "okay or mediocre" judgment rather then a strong approval or dis-approval.
This is a very nice and witty way to say f#%k off in the pacific northwest because there is a large Dicks burgers chain all around that everyone grew up with, so the meaning will not be lost on an adult and any nearby children will not be scarred.
Officer, The db level is withing legal guidelines for this time of day so tell my neighbor i said to Go eat a bag of Dicks and swallow a vanilla shake while you're at it