To complain about someone else who complains all the time or to complain about a complaint someone else has made.
So anyway, my friend does nothing but bitch all day, and I'm really getting sick of it. Sorry for the meta-bitching.
Noun: A friend who offers blindingly honest and ridiculously logical advice. Someone who tells people the things they often don't want to hear.
Other definition: a somnambulist ninja.
I was sure sleeping with my coworker wasn't a bad idea, but luckily my friend turned Joy Jump on me and made me see the light.