I've always heard "booty bumps" referred to as putting meth on your dick, then fucking your partner in the ass to get them high.
I've given some of my subs a champagne enema, and they seem to enjoy getting pretty drunk off of it. You have to watch how long you keep it in though; it can be pretty dangerous if you're new to it.
If you're wanting to put hard alcohol into your system rectally, soak a tampon in something not-so-harsh such as vodka, then insert it into your rectum. This way, when it starts to burn, you'll realize it's probably a bad idea, and will be able to remove it quickly. However, if you're going to inject it anyway, use a very small amount, such as 1cc or less as you mentioned. If you inject, there is no going back, such as with a tampon. Since the intestine is much better at absorbing alcohol than the stomach, it is very easy to overdose.
Your breath will not smell like alcohol, but you will still not be able to pass a breathalyzer if you get drunk from it.