When a 45 year old mullet wielding, fake-tan having, sunglass wearing, super dyke-type female calls your bat phone talking about going out together to get beers and then saying "whatever happens, happens" which ultimately gives you free reign to the merkin covered beefy curtain. This isn't just a regular date, it is the most special of dates and that being a prom date.
This bitch, who works with me, called me up stuttering and stammering about going out for some beers and when I told my friends about it, they said do you want us to book you a limo for your 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.