From A Wiki of Ice and Fire

The Three Whores are three great trebuchets built inside the Mud Gate in King's Landing.
Recent Events
[edit]A Clash of Kings
[edit]The trebuchets are called the Three Whores by members of the gold cloaks because they are supposed to give Stannis Baratheon a lusty welcome when he comes to attack King's Landing in the Battle of the Blackwater.[1]
References
[edit]- ↑ A Clash of Kings, Chapter 49, Tyrion XI.