Bendable is an adjective that is usually used by males (guys) to describe a chick they feel is good enough to have sex with. Being bendable doesn't necessarily make a chick hot. Being bendable just means that, if you asked or if the guy got the chance, he would bone you. So, in a sense, if you are not "bendable" you must be pretty ugly or messed up.
*Hot chick walks by*
Guy 1: "That chick is bendable, man."
*Okay-looking chick walks by*
Guy 2: "Yeah, she's bendable too."
*Fat, nasty, old chick walks by*
Guy 3: "Dude, she is NOT bendable. I'd never hit that."
adj - used to describe someone who is easily persuaded, or rules that can be broken (or "bent").
bending - to be dependent on some other event, used the same as "pending".
If you have heard someone use one of these in a sentence, it wouldn't quite make sense but you could figure out what they meant.
We should hook Andy up with some hookers.
Doesn't he have a girlfriend?
Yes, but he's pretty bendable in that department.
2.) Is your mom going to mad at us for drinking all the Dr. Pepper?
I don't know; that's bending.