(n). A long, droning speech given by someone who talks but doesn't listen. Oft, the listener tries to escape but has to be polite and smile.
2. an unnecessary meeting, as in a monthly meeting where nothing gets done.
3. unwanted advice usually given to a person when they least want to hear it.
Hey Tom! I tried calling you the other night. YOu weren't in. Sorry, man, I got caught up in a bullshit session.
I'll know better next time not to complain to mr. knowitall. I got a free introductory bullshit session.