back-up, back-up prom date 

This is basically someone that you know will say go with you to prom if you ask them. This has to be a person that you can relatively stand for a full night, or else can stand to stand next while taking pictures and then ditch him/her for the rest of the night and hang out with that person that you actually wanted to come with. This has to be a person that you know no one else will want to ask, so they are definately available.

Steve is my back-up, back-up prom date, so I know that I am guaranteed to be going with someone.

back-up, back-up prom date by carolinimartini February 21, 2006

back-up channel 

There are usually "back-up channels" in which to people use in times when all other channels are on adverts. This saves people from being bored and changing activity to going outside or reading.

Dude - "I'm so glad we have this back-up channel.. i mean police camera action is pretty boring but i'm glad we're not watching some shitty adverts.
Dude-et - "yeah the adverts these days are just all for freakin injury lawyers.."

back-up channel by Jonny Clarke July 5, 2009

Back-up plan 

Keeping a person on the side as an alternative if original plan falls through.

If all else fails I've got so and so as a back-up plan, you know as a last resort.

Back-up plan by Mister please May 10, 2018

Back up the bus

in reference to being told something unbelievable or shocking, means to hold on and go back to what was just said; request to repeat and readdress a comment.

"Whoa. Back up the bus - what did you just say?"

"Hang on - back up the bus. You were doing WHAT last night?!"

Back up the bus by mypseudonym2012 September 26, 2011

Back-up Shoes

Your shoes that you keep in your locker at school just in the case of you having to poop in the stall and you don't want people to know its you by the look of your shoes .

I took a shit at school today, good thing I had my Back-up Shoes in my locker.

Back-up Shoes by Gimaf December 18, 2012

Back-up Friend

someone you are friends with, but doesn't make the list(first cut, VIP, ect) for an activity, and then is called upon to fill in when a "Real friend" cannot be there

1)Hey did you enjoy the party?
Nah, i didn't know there was one.:(
Oh that's right, because you're a BACK-UP FRIEND! HAHA

2) Hey man, i can't make it tonight. Call Drew, you know he doesn't have any real friends.
Hey Drew wanna come to the party tonight?
YEAH SURE MAN, THANKS FOR INVITING ME.

Back-up Friend by Tim Horlacher May 24, 2006

back up bitch 

A bitch to bring as back up to an event such as a concert, party, etc... basically any social event, as insurance for getting laid incase the social event isn't providing bitches that are bangable.

Awesome guy one: "dude! let's go see def leppard and hit on some milfs!"

Awesome guy two: "i'm down but we better bring some back up bitches incase they all turn out to be cracked out moms."

back up bitch by thesean March 28, 2012