A text message, usually a really long text message. Most commonly sent by angry white women.
My main chick just sent me another phone letter. I better put my phone on charge.
Doc Brown or Doc Browning.
Being really jacked up, jumpy, excited, overwhelmed with crazy uncontrollable joy/nervousness or just really meth'd the fuck out!
Q: Yo, you got any of that Doc Brown left?
A: No
Q: What!? Then why is your homeboy spinning around real fast walking backwards over there building a porch with a fucking umbrella?..... He's Doc Browning like a motherfucker.