NEED SOME HELP

[Burnt Toast]

I have a drug test on thursday at 8 AM, I plan on getting clean piss from my buddy and keeping it in a 2 oz bottle in my underwear, but the problem is I cant get it from him right before my test, so I have to get it wednesday night. How do I keep it fresh? Do I refrigerate it? or just keep it heated over night til my test in the morning?

With your test being Thursday, the sub sample can be chilled in the fridge until then.

Also I am a male, does it matter if I use piss from a female?

No it does not. Drug testing devices cannot distinguish male/female - they can only distinguish drugs. Therefore, any human sample will work as long as its drug-free.