basically, "choppin' it up" means just shooting the breeze with friends, i.e. conversing and just
talking about whatever comes to mind. Chopping it up can refer to analyzing a situation, such as breaking it down and explaining it.
Choppin' it up is usually experienced best while having a
cold beer in hand. You can chop it up anywhere, in the car, on a plane, in the restroom, or
even via text messaging.
"I called my
boy and we
chopped it up for awhile about last night"
"We didn't have a lot of
work to do today, so we just sat around choppin' it up"
person 1: "So, what do you think about leaving Thursday night instead of Friday morning?"
person 2: "It's definitely on the table, but we might have to chop it up first."