1. A way of saying that you want some good food from Sonic. Sonic the fast food resturaunt having 'bomb ass food'. The equivelent of 'good shit' is sonic dick.
2. It is also a way of getting what could be refered to as a roll up blow job. If you ask for an employee to deliver you an extra long number 4, please make sure they give you an extra heeping of sonic dick with a little bit of a stray bandit on the side.
"Yo, I don't give a fuck. I just want to eat some sonic dick."
"Hey, that extra long jalepeno hotdog kinda reminds me of sonic dick."
Employee: "How can we help you?"
*** the Man: "I'd like some sonic dick."
Employee: "I'm sorry, I didn't catch that?"