Was Dave One-Upped or One-Downed?

When I mentioned that my dog Sirius requires two bags for his morning walk, my friend Stacey -- who is taller than me, but has a much smaller dog -- one-upped me and claimed that her dog Norman fills THREE bags on his evening walk . . . and while I'm not sure if this "one-upping" or "one-downing," I loved the conversation, because instead of "humblebragging" -- an act that I detest -- we were actually bragging, which is something I love (even if the topic is the amount of fecal matter our pets produce).