to get down, or get yourself together, although to get down for someone also means to go to the ultimate for that person or for the gang. To have back-up in a sense.
(Pronounced hell-uh fear-may.) *Firme is Spanish for firm.* Hella Firme is a code name for someone who is good looking that you and one of your friends are low key crushing on. In order for you both to talk about him/her without anyone else knowing you call them "Hella Firme" instead of their actual name. {Hella Firme can be abbreviated to HF when talking about that person while texting.}