Slang term for the beginning of any sequence or time frame.
I knew Bush would be a nightmare from jump street.
From the beginning. Where it all started.
I've been rocking Jordan's since jumpstreet.
The place you started out from; your childhood origins; a long time ago. Southern (Georgia?) in origin. Literally, a jumping off point.
Man, I've been hearin' crap from people like that since jump street!
a person who is in their 20 or 30s, yet still look and act as if they are still in their teens. based on the concept of the show 21 Jumpstreet
that guy may look young but he is straight up jumpstreet and was born in the 80s.