There I was thinking you meant a completely different type of log? And was also wondering who this filthy Ana was?
Urban Dict No# 3 (<should be number 2 methinks):
LOG
A very firm and large turd. Often the result of constipation that has caused several days worth of poo buildup. It can be very painful from stretching the hole much wider than normal. Other problems caused by logs can include getting stuck because of excessive thickness got one hanging and very extended times sitting on the toilet due to excessive length.