When
people (who either have no life, are
jealous, or just completely
pathetic) take part in the action of stating negative, rumored, or exaggerated stories about someone else in order to make themselves in turn feel better by making the other person look worse when in actuality the person being shit talked about is most likely a better person.
Ian said to Jacob "dude, Brit is applying to a historically black college so he can get a scholarship and start a future for himself by joining ROTC and becoming one of the brave men that defend our country, how f*cking
lame" I.e.
Ian is shit talking